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Entomology

Title Summary Date ID Author(s)
4-H Honey Bee Leaders Guide Book II -- Veils, Smokers, and Supers: Equipment of Beekeepers PDF (12MB)

To the 4-H Leader: The beekeeping project books (1- 4) are intended to teach young people the basic biology and behavior of honey bees in addition to hands-on management skills. The honey bee project books begin with basic honey bee and insect information (junior level) and advance to instruction on how to rear honey bee colonies and extract honey (senior level). These project books are intended to provide in-depth information related to honey bee management, yet they are written for the amateur beekeeper, who may or may not have previous experience in rearing honey bees.

Sep 8, 2009 380-075
4-H Honey Bee Leaders Guide Book I -- The Buzz About Bees:Honey Bee Biology and Behavior PDF (4MB)

To the 4-H Leader: The honey bee project (Books 1 - 4) is intended to teach young people the basic biology and behavior of honey bees in addition to hands-on beekeeping  anagement skills. The honey bee project books begin with basic honey bee and insect information (junior level) and advance to instruction on how to rear honey bee colonies and extract honey (senior level). These project books are intended to provide in-depth information related to honey bee management, yet they are written for the amateur beekeeper, who may or may not have previous experience in rearing honey bees.

Sep 9, 2009 380-071
4-H Honey Bee Youth Project Book II -- Veils, Smokers, and Supers: Equipment of Beekeepers PDF (11MB)

The beekeeping project (Books 1- 4) teaches you the basic biology and behavior of honey bees (junior level) in addition to hands-on management skills. The four honey bee project
books provide instruction on how to rear honey bee colonies beginning with the purchase of a package of bees, continuing through the first year of colony development, and ending with the extraction of honey (senior level). These project books are intended to provide in-depth information related to honey bee management, yet they are written for the amateur
beekeeper, who may or may not have previous experience in rearing honey bees.

Sep 9, 2009 380-074
4-H Honey Bee Youth Project Book I -- The Buzz about Bees: Honey Bee Biology and Behavior PDF (5MB)

The beekeeping project (Books 1 - 4) will teach you the basic biology and behavior of honey bees and give you hands-on management skills. The honey bee project books begin with basic honey bee and insect information (junior level) and advance to instruction on how to rear honey bee colonies and extract honey (senior level). These project books are intended to provide in-depth information related to honey bee management, yet they are written for the amateur beekeeper, whether or not you have previous experience in rearing honey bees.

Sep 9, 2009 380-070
Aphids PDF (165KB)
Aphids, or plant lice, are small, soft-bodied insects. There are hundreds of different species of aphids, some of which attack only one host plant while others attack numerous hosts. Most aphids are about 1/10 inch long (2.54 mm), and though green and black are the most common colors, they may be gray, brown, pink, red, yellow, or lavender. A characteristic common to all is the presence of two tubes, called cornicles, on the back ends of their bodies. The cornicles secrete defensive substances. In some species they are quite long, while in others they are very short and difficult to see.

Aphids feed in clusters and generally prefer new, succulent shoots or young leaves. Some species, known as wooly aphids, are covered with white, waxy filaments, which they produce from special glands.

May 1, 2009 444-220
Aphids in Virginia Small Grains: Life Cycles, Damage and Control PDF (745KB)

Four species of aphids attack small grains in Virginia -- greenbug, corn leaf aphid, bird cherry-oat aphid, and English grain aphid. In general, these aphids are small pear-shaped insects (1/16 to 1/8 inch long) that are green to nearly black, or sometimes pinkish in color. Immature aphids look just like adults except smaller. Both winged and wing-less forms can occur in the same colony. All grain aphids have a pair of conicles, tailpipe-like projections, on the top side of the tail end. Aphids feed singly or in colonies on upper and lower leaf surfaces and stems. They feed near plant bases when plants are young or during cold weather, and on upper-canopy leaves, stems, and even grain heads later in the season.

May 1, 2009 444-018
Applying Cost Benefit Analysis to Nutrition Education Programs: Focus on the Virginia Expanded Food and Nutrition Education Program PDF (29MB) May 1, 2009 490-403
Asiatic Garden Beetle in Field Corn PDF (994KB)

Order: Coleoptera

Family: Scarabaeidae

Species: Maladera castanea (Arrow)

Size: The adult beetle is 5/16 to 7/16 of an inch long (slightly smaller than a Japanese beetle adult). A fully developed grub (third instar) measures about 3/4 inch long

Color: The adult is chestnut brown or reddish brown in color and faintly iridescent (Fig. 1). The grub (immature stage) is off white except for a distinct head capsule and three pairs of true legs that vary from in color from orange to dark brown.

Description: The beetle abdomen is covered by a pair of hardened forewings, or elytra, which are not used in flight. Instead, their main purpose is to protect the hind wings, which are folded up under the elytra when the insect is not in flight. The grub has a distinct head capsule and three pairs of true legs and will fold into a 'C' shape when disturbed (Fig. 2). It is very easy to differentiate an Asiatic garden beetle grub from other annual white grub species with the aid of a 10x power hand lens. The grub has a single transverse row of spines on the underside of the last abdominal segment, or raster, and a 'Y' shaped anal slit (Fig. 3).

May 1, 2009 444-108
Asparagus Beetles PDF (835KB)

Two species of asparagus beetles are found in Virginia, the asparagus beetle, Crioceris asparagi (L.), and the spotted asparagus beetle Crioceris duodecimpunctata (L.). Adults of the asparagus beetle are 1/4 inch (6.25 mm) long, metallic blue to black, and have wing covers with three or four white spots and reddish margins. The thorax is red and usually marked with two black spots. The spotted asparagus beetle is about 1/3 inch (8.3 mm) long and orange with 12 spots on its wing covers. Larvae of both are olive green to dark gray with a black heads and legs. Larvae measure about 6/100 inch (1.5 mm) at hatching, and as they develop they become plump and attain a length of about 1/3 inch (8 mm). Both have eggs that are approximately 4/100 inch (1 mm) long, oblong, shiny, black,\ and are attached by one end to asparagus spears.

May 1, 2009 444-620
Asparagus Beetles on Asparagus PDF (181KB)

The asparagus beetle is a sporadic pest that can be aggravating for asparagus growers throughout Virginia. The shoot damage not only reduces the quality of the spears but this beetle is also unique in the pest world, as it is an insect that is controlled because the eggs laid on the shoots is objectionable to consumers. With a little background on this pest most growers are able develop an effective pest management program.

Jul 29, 2009 2906-1352
Bagworm PDF (132KB)

Lepidoptera: Psychidae, Thyridopteryx ephemeraeformis

Plants Attacked: Juniper, arborvitae, other cedars, pine, hemlock, spruce, Chinese elm, honeylocust, primarily. Also on crabapple, maple, sycamore, box elder, willow, linden, poplar, and many others.

May 1, 2009 2808-1008
BALSAM TWIG APHID Homoptera: (Aphididae, Mindarus abietinus) PDF (264KB) Aug 5, 2009 2907-1401
Bark Beetles PDF (1MB)

Order: Coleoptera

Family: Cerambycidae

Size: Larvae up to 3 1/4 inches (80mm) or more.

Color: Adult longhorned beetles are medium to large cylindrical beetles, usually brown, reddish brown, or black in color. They are sometimes mottled or banded with white or gray. Larvae (roundheaded borers) are brown, reddish brown, or black. They are sometimes mottled or banded with white or gray.

May 1, 2009 444-216
Bean Leaf Beetle Biology and Management in Snap Beans PDF (901KB)

Order: Coleoptera

Family: Chrysomelidae

Species: Cerotoma trifurcata (Forster)

Size: Adults are about 1/4 inch (64 mm) long.

Description: Adults range in color from yellow to a dull red with variable numbers of black spots (Fig. 1). Although some have no spots, most will have four black spots down the center of the back with marginal spots or stripes on the edge of the elytra. The distinguishing characteristic is that all have a distinct black triangle behind the prothorax. Eggs are reddish orange ovals about 3/100 inch (0.8 mm) long and have tapered ends. Larvae are white, cylindrical grubs with a black head and anal plate. They have well-developed thoracic legs as well as anal prolegs. The pupae are white and resemble the adult in size and shape.

May 1, 2009 444-009
Black Vine Weevil PDF (674KB)

Plants Attacked

The adults feed on a wide variety of evergreen, deciduous, and herbaceous plants. The larval form is destructive on yew (taxus), hemlock, rhododendron, and several other broad-leaved evergreens. Adults and larvae will sometimes feed on strawberry and impatiens.

Description of Damage

Two kinds of damage are conspicuous: Adults chew marginal notches in leaves, causing damage that quite often is confused with a disease or chemical injury. The adults feed from the outer margin of the leaf inward, creating characteristic notches, and these notches can be used as an early indicator of potential larvae in the soil. Adults cut notches on the margins only; they never create holes on the center of the leaf.
May 1, 2009 444-210
Brown Marmorated Stink Bug PDF (477KB)

Homoptera: Penatomidae: Halyomorpha halys

Distribution and Hosts

The Brown Marmorated Stink Bug (BMSB), is found throughout Virginia although some isolated pocktes of the Commonwealth have not seen this insect yet. The BMSB is an invasive insect not native to Virginia or North America. It was accidentally introduced near Allentown, PA in 1998 and has spread since that time. It feeds on a wide range of fruits and seed pods and has the potential to be a pest on peaches and soybeans. For homeowners, it is mainly a nuisence pest, as it invades houses in the winter lookng for a place to over-winter.

May 21, 2009
Cabbage and Seedcorn Maggot PDF (712KB)
Cabbage maggots canbe very destructive pests of early-season plantings of cole crops: cabbage, cauliflower, broccoli, and brussels sprouts. Additional hosts include beet, radish, turnip, and celery.

Seedcorn maggots are known to attack asparagus, cabbage, turnip, radish, onion, beet, spinach, potato, and sprouting corn seeds. Seedcorn maggots can also be very damaging to beans and peas and new plantings of alfalfa.

May 1, 2009 444-231
Cabbage Webworm PDF (213KB)

The cabbage webworm is found throughout the southern United States from Virginia to Florida and west to California. It is rarely a pest in northern climates. In eastern Virginia, it is a common pest on broccoli and cabbage, particularly late in the summer and fall.

May 1, 2009 2811-1022
Catalpa Sphinx Caterpillar, Lepidoptera: Sphingidae, Ceratomia catalpae (Boisduval) PDF (4MB)

Catalpa sphinx caterpillars, also known as “Catalpa worms”, are major defoliators of catalpa. With their chewing mouthparts, they strip away large portions of the leaves. In heavy infestations they can completely defoliate the entire tree. Apparently trees on high ground with poor soil are rarely, if ever, attacked. In some years, depending on the region, many trees will have all their leaves stripped away by the end of the summer. This may be followed by years with no defoliation observed at all. The fluctuation between outbreak and no defoliation is largely due to the
activity of parasites.

Nov 20, 2009 2911-1421
Colorado Potato Beetle PDF (1MB)

Scientific Name: Coleoptera: Chrysomelidae, Leptinotarsa decemlineata

Size: Adults are ~ 3/8 inch long by 1/4 inch wide; mature larvae are 1/2 inch long.

Color: The adult thorax is orange with black spots and the wing covers have five yellowish white and five black alternating stripes running lengthwise (Fig. 1); the larvae are reddish in color with two rows of black spots along each side (Fig. 2); and eggs are yellow (Fig. 3).

Description: The adult beetle is convex above; larvae are smooth, soft-bodied, and humpbacked; and individual eggs somewhat resemble small sausages standing on end.

May 1, 2009 444-012
Commercial Vegetable Production Recommendations PDF (3MB) May 21, 2009 456-420
Common Ticks of Virginia PDF (7MB) Jul 2, 2009 2906-1396
Corn Earworm Biology and Management in Soybeans PDF (94KB)

Corn earworm, Helicoverpa zea, is the most common and destructive insect pest of soybeans grown in Virginia. Although infestation severity varies, about one-third of our acreage is treated annually. This costs farmers 1.5 to 2 million dollars annually, and requires the application of many pounds of insecticide to crop lands. We may never eliminate this pest from Virginia soybeans, but knowledge of the biology and use of best management practices can help limit insecticide controls to those fields that meet economic threshold criteria. This publication provides current information on corn earworm biology, prediction of outbreaks, pest advisories, scouting procedures, and recently revised economic thresholds.

May 1, 2009 444-770
Cottony Maple Scale PDF (141KB)

Cottony Maple Scale (Homoptera: Coccidae), Pulvinaria innumerabilis

PLANTS ATTACKED: Maples and dogwood primarily, but also many woody ornamentals.

May 1, 2009 2808-1011
Cucumber Beetles PDF (142KB)

Plants Attacked: Cucumber, cantaloupe, winter squash, pumpkin, gourd, summer squash, and watermelon, as well as many other species of cucurbits. Cucumber beetles may also feed on beans, corn, peanuts, potatoes, and other crops.

May 1, 2009 2808-1009
Diamondback Moth in Virginia PDF (1MB)

The Diamondback moth (DBM), Plutella xylostella (L.), is considered to be the most destructive insect pest of crucifer crops worldwide. DBM larvae feed on leaves of crucifer crops such as cabbage, broccoli, cauliflower, collards, kale, kohlrabi, Chinese cabbage, and Brussels sprouts. All plant growth stages from seedling to head are susceptible to attack. DBM larvae can reach high densities and cause substantial defoliation as well as contamination and malformation of heads in cabbage, broccoli, and cauliflower. The absence and reduction of effective natural enemies, especially parasitoids, as well as insecticide resistance, contribute to the status of DBM as a pest.

May 1, 2009 444-007
Dogwood Borer PDF (485KB)

Lepidoptera: Sesiidae, Synanthedon scitula

PLANTS ATTACKED: Dogwood, pecan, elm, hickory, and willow

May 1, 2009 2808-1010
Dogwood Twig Borer PDF (563KB)

Coleoptera: Cerambycidae, Obrea tripunctata

Plants Attacked

Elm, dogwood, viburnum, and many fruit trees.

Description of Damage

The larvae tunnel in live twigs and feed down the center of the branch, making a long series of closely placed round holes for the exudation of frass. Periodically, the larvae cut off portions of the twig from within and continue to feed inside the twig on the green wood working their way down.

May 1, 2009 444-625
Droplet Chart / Selection Guide PDF (425KB)

Nozzle type and application pressure govern droplet size (see Nozzles: Selection and Sizing, Virginia Cooperative Extension publication 442-032), which in turn affects system output (application rate), target deposition, uniformity, efficacy, and the risk of drift. Off-target movement in the form of spray drift is a major concern because it diverts the chemical from the intended target, reduces efficacy, and deposits pesticide where it is not needed or wanted. When a pesticide drifts, it may cause both environmental and economic damage, including exposure to people and property, injury to susceptible vegetation, harm to wildlife, deposition of illegal residues on crops, and contamination of water supplies.

May 27, 2009 442-031
Eastern Tent Caterpillar PDF (58KB)

The larval or caterpillar stage is brown and is quite hairy. It has a white stripe running down the back that is bordered by yellow brown. In addition the caterpillar has a row of blue spots down each side. The adult moth is a dark tan color with two pale stripes on each of the front wings. Although similar they are not the same insect as a gypsy moth.

May 1, 2009 444-274
Emerald Ash Borer PDF (2MB)

Coleoptera: Buprestidae, Agrilus planipennis Fairmaire

Plants Attacked: Emerald ash borer (EAB) attacks all species of ash trees that grow in Virginia. Only Asian species of ash trees have shown any resistance to this pest.

May 1, 2009 2904-1290
Euonymus Scale PDF (87KB)
Female scales have a pear-shaped, dark brown scale covering. Males are more slender than the females and are white with a yellow cap on one end. The male scale covering has three ridges running its length. Both sexes are easily observable on plants and are normally 1/16 inch long. All stages are yellow when observed beneath the scale covering.
May 1, 2009 444-277
European Corn Borer PDF (804KB)

Description of Damage

European corn borer (ECB) is a major pest of corn grown for grain in Virginia. This pest is found throughout the commonwealth, but its population density fluctuates from year to year in a given locality. Typical damage to corn plants caused by this insect are reduced plant vigor leading to subsequent ear drop and stalk lodging.


Identification

When fully grown, ECB larvae are 3/4 to 1 inch in length and creamy-white to pink in color. The larval head capsule is dark brown and, on top of each abdominal ring or segment, there are several small dark brown or black spots. (Figure 1)
May 1, 2009 444-232
European Corn Borer in Sweet (Bell) Pepper PDF (1MB)

The European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Crambidae), is a significant pest to over 200 different plant species. In Virginia, it is the number one pest of pepper, Capsicum annuum L. This pest can damage over 50 percent of pepper fruit if control measures are not taken.

May 1, 2009 444-006
European Hornet, Hymenoptera, Vespidae: Vespa crabro germana PDF (1MB)

The European hornet is a stout hornet approximately 1-inch long. The color of the head and thorax is dark reddish brown with deep yellow and brown black markings on the abdomen. The  markings on the abdomen are similar to the markings found on yellow jackets. The European hornet resembles the cicada killer wasp but is more robust and has more hair on the thorax and
abdomen (but is not as hairy as a bee).

Nov 20, 2009 2911-1422
Fall Armyworm in Vegetable Crops PDF (1MB)

Scientific Name: Lepidoptera: Noctuidae Spodoptera frugiperda (J.E. Smith)
Size: Caterpillars vary in length from 1/2 inch (2mm) as first instar larvae to 3/4 to 1 inch (35 to 50mm) as mature larvae (See Fig. 1). Adult moths have a wingspan of 1.2 to 1.6 inches (32 to 40mm).

Color: Larvae vary in color from light tan or green to dark brown (nearly black) [base color ranging from yellow-green to a dark brown to gray] with three yellowish-white lines down the sides and back from head to tail and four dark circular spots on the upper portion of each abdominal segment. Front of the head is marked with a prominent inverted white Y, but this characteristic is not always a reliable identifier. The forewing of adult male moths is generally shaded gray and brown, with triangular white spots at the tip and near the center of the wing. The forewings of females are less distinctly marked, ranging from a uniform grayish brown to a fine mottling of gray and brown. The hind wing is iridescent silver-white with a narrow dark border in both sexes.

Description: Larvae are hairless and smooth skinned (See Fig. 1).

May 1, 2009 444-015
Fall Webworm PDF (147KB)

Distribution and Hosts Native to North America, the fall webworm occurs throughout the United States and southern Canada. Its hosts include more than 100 species of deciduous forest, shade, and fruit trees, with preferences varying from region to region.

May 1, 2009 2808-1013
Field Guide to Stink Bugs PDF (19MB) Jul 29, 2009 444-356
Fine Tuning a Sprayer with "Ounce" Calibration Method PDF (915KB)

This extension publication discusses guidelines to quickly evaluate the performance of a sprayer. Sprayer calibration, nozzle discharge, spray pattern uniformity, speed checks, pump performance and plumbing arrangements are evaluated with minimal calculations.

Tractor-mounted, pull-type, pick-up-mounted and self-propelled sprayers are available from numerous sources. Rising chemical costs and new low rate chemicals are making accurate application more important than ever before. Proper calibration must be a primary management consideration whether one is a farmer or a custom applicator. Since most pesticides are applied with hydraulic sprayers, users should also know proper application methods, chemical effects on equipment, and correct cleaning and storage methods for hydraulic sprayers.

May 1, 2009 442-453
Gardening and Your Health: Ticks PDF (2MB)

During early spring and summer, as the weather warms up and the garden springs back to life from its winter dormancy, many gardeners -- and ticks -- eagerly return to their outdoor activities. Gardeners should be aware of the risks and know how to protect themselves from becoming hosts to disease-carrying ticks.

May 1, 2009 426-066
Giant Resin Bee PDF (297KB)

Scientific Name: Hymenoptera: Megachilidae Megachile sculpturalis Smith

Size: about 0.75 inch (1.9 cm) Color: Black and yellow-brown Description: Giant resin bees are large with a cylindrical body and large jaws. They have a dark head and abdomen with yellow-brown hair on the face, thorax, and the first segment of the abdomen behind the "waist." The wings are a transparent brown color that darkens toward the tips. Male giant resin bees have a truncated, squared abdomen while the females have a more tapered, pointed abdomen.

Giant resin bees can be distinguished from bumblebees and carpenter bees by their cylindrical bodies and the appearance of their abdomens. Giant resin bees do not have hairy abdomens like bumblebees, nor are their abdomens shiny like carpenter bees.

May 1, 2009 444-206
Green Peach Aphid on Vegetables PDF (217KB)

Homoptera: Aphididae, Myzus persicae

Distribution. The green peach aphid can be found worldwide and is considered a pest of numerous vegetable crops throughout the Commonwealth of Virginia.

May 1, 2009 2902-1081
Groundwater Quality and the Use of Lawn and Garden Chemicals by Homeowners PDF (2MB)

The people of Virginia use nearly 400 million gallons of groundwater each day to meet industrial, agricultural, public, and private water demands. One-third of Virginia's citizens rely on groundwater as their primary source of fresh drinking water, and 80 percent of Virginians use groundwater to supply some or all of their daily water needs. Groundwater is an important resource, but it is a hidden one and, therefore, is often forgotten. In fact, until recent incidents of groundwater contamination, little attention was paid to the need to protect Virginia's groundwater.

May 1, 2009 426-059
Gypsy Moth in Virginia: An Update PDF (143KB)

Most Virginians are aware that the gypsy moth is a serious pest of hardwoods in our state. Although this insect has maintained a low profile the past few years, there was a general resurgence in moth populations in 2000. This population increase serves as a reminder that, in areas where gypsy moth has become established, this pest is still present in the environment even when populations are too low to be noticed.

Gypsy moth is a native of Europe, Asia, and northern Africa. It was accidentally released in the U.S. over 130 years ago by a Frenchman who wanted to cross it with native silk moths. From its original introduction near Boston, Massachusetts, this pest has spread into the mid-Atlantic and Midwestern states (Fig. 1).

May 1, 2009 444-750
Gypsy Moth Management for Homeowners on Small Properties PDF (816KB)

The gypsy moth, native to Europe and Asia, is a major invasive pest of hardwood forests in the U. S. Introduced into Massachusetts in 1869, the gypsy moth has rapidly moved into other regions of the country and is responsible for large amounts of defoliation each year. Most of Virginia is generally infested by this pest. Visit http://fubyss.ento.vt.edu/vagm/ to read more about the gypsy moth biology and control.

May 1, 2009 2811-1021
Japanese Beetle PDF (727KB)

Coleoptera: Scarabaeidae, Popillia japonica

Distribution:  The Japanese beetle is found throughout Virginia and in most of the Eastern United Stages. In regions west of the Mississippi it is found in isolated pockets. Japanese beetles were first found in New Jersey in 1916 and have spread from that point since. The Japanese beetle has been well established in Virginia since the early 1970’s.

May 1, 2009 2902-1101
Japanese Beetle in Field Corn PDF (1MB)

Scientific Name: Coleoptera: Scarabaeidae Popillia japonica Newman

Size: Adult is 1/3 to 1/2 inch long; the fully developed grub or larva is 1/2 to 1 inch long.

Color: The adult is shiny metallic green with copperbrown wing covers and is characterized by the presence of five tufts of white hairs which protrude from under the wing covers along each side of the abdomen, with two additional tufts of white hairs on the tip of the abdomen (Fig. 1); the grub has a distinct head capsule that is dark brown to orange in color with the rest of the body an off-white or grayish color due to the presence of soil or fecal matter in the hindgut (Fig. 2).

May 1, 2009 444-106
Japanese Beetle Pest Management in Primocane-Bearing Raspberries PDF (2MB) Sep 15, 2009 2909-1411
Japanese Weevil PDF (703KB)

Coleoptera: Curculionidae, Pseudocneorhinus bifasciatus

Plants Attacked

The Japanese weevil has a long list of hosts, but is especially found on cherry laurel, broad-leaved evergreens, pyracantha, privet, barberry, euonymus, and many others.

Description of Damage

Foliage is more or less chewed, beginning as marginal notches and increasing to large rounded sections of the leaves being consumed. Holes are always cut inward from the margin, never in the inner part of the leaf. Larvae feed on roots of plants in the soil, but their habits are not well known, nor is the extent of the injury they produce. Injury is not distinguishable from that caused by black vine weevil, fullers rose beetle, and other species.

May 1, 2009 444-624
Lilac Borer/Ash Borer PDF (1MB)

Life Cycle: As winter passes, the immature larvae is in the stem of lilac and ash near the surface of the soil. Feeding and continued development begins in early spring and is completed by early summer. It then pupates in the stems and in three weeks emerges as the adult (early May through early July). Oviposition occurs shortly after emergence and mating. The eggs are laid about the base of lilac canes or on ash stems. The hatching larvae bore into the host and become half grown by cold weather. There is one generation per year.

May 1, 2009 444-278
Longhorned Beetles/Roundheaded Borers PDF (1MB)

Order: Coleoptera

Family: Cerambycidae

Size: Larvae up to 3 1/4 inches (80mm) or more.

Color: Adult longhorned beetles are medium to large cylindrical beetles, usually brown, reddish brown, or black in color. They are sometimes mottled or banded with white or gray. Larvae (roundheaded borers) are brown, reddish brown, or black. They are sometimes mottled or banded with white or gray.

May 1, 2009 444-215
Magnolia Soft Scale PDF (512KB)

Homoptera: Coccidae, Neolecanium carnuparuum

Plants Attacked

Magnolia

Description of Damage

Heavy magnolia soft scale infestations cause stunting of twigs and undersize leaves, visibly weakening the trees. Small trees may be killed. Large trees lose branches and tree shape may become irregular.

May 1, 2009 444-623
Managing Stink Bugs in Cotton: Research in the Southeast Region PDF (2MB)

Stink bug pests across the south eastern cotton belt consist of three main species: the brown stink bug, Euschistus servus (Say); the green stink bug, Acrosternum hilare (Say); and the southern green stink bug, Nezara viridula (L.)  Due to the diverse environmental conditions across this production region, population levels of these species vary widely across seasons, states, and fields. In North Carolina and Virginia, green and brown stink bugs are the primary species, while southern green and brown stink bugs predominate in Georgia,and all three species are commonly observed in South Carolina.

Sep 23, 2009 444-390
Multicolored Asian Lady Beetle in Virginia PDF (247KB)

Multicolored Asian Lady beetles enter the house through small openings around windows, doors, and utility access points. In addition, they can enter the house by cracks in the siding and trim and through attic vents. Sealing those entry sites is the best method to keep them from becoming indoor pests later. Conduct a thorough energy audit of your house, as places where cold air can enter the house are places where this lady beetle can gain access. Fill all cracks and leaks with a fine quality silicone or silicone-latex caulk.

May 1, 2009 444-275
Nozzles: Selection and Sizing PDF (1MB)

This fact sheet covers nozzle description, recommended use for common nozzle types, and orifice sizing for agricultural and turf sprayers. Proper selection of a nozzle type and size is essential for correct and accurate pesticide application. The nozzle is a major factor in determining the amount of spray applied to an area, uniformity of application, coverage obtained on the target surface, and amount of potential drift.

May 26, 2009 442-032
Pales Weevil PDF (2MB)

Coleoptera: Curculionidae, Hylobius pales (Herbst)

Plants Attacked: Pales weevil feeds on all pines within its range. It will also feed, although to a lesser extent, on Douglas-fir, fir, hemlock, juniper, larch, northern white-cedar, and spruce.

May 1, 2009 2902-1102
Pepper Maggot in Sweet (Bell) Pepper PDF (958KB)

The pepper maggot, Zonosemata electa (Say) (Diptera: Tephritidae), is native to eastern North America and is thought to have moved from the weedy perennial horse nettle, Solanium carolinense L., to domesticated crops like the bell pepper. Pepper maggot occurrence in pepper is patchy and sporadic. However, infestation can reach 100 percent of the fruit with only a single maggot causing the destruction of an entire pepper fruit.

May 1, 2009 444-005
Periodical Cicada PDF (253KB)

In Virginia both the 17-and 13-year cicadas damage many ornamental and hardwood trees. Oaks are commonly attacked but the most seriously damaged are newly planted fruit and ornamental trees such as apple, dogwood, peach, hickory, cherry, and pear. Pines and other conifers are not commonly attacked.

May 1, 2009 444-276
Pesticides and Aquatic Animals: A Guide to Reducing Impacts on Aquatic Systems PDF (966KB) May 1, 2009 420-013
Pest Monitoring Calendar for Home Lawns in Virginia PDF (292KB) May 1, 2009 430-524
PINE BARK ADELGID PDF (138KB) Aug 5, 2009 2907-1402
PINE NEEDLE SCALE Homoptera: Diaspididae, Phenaeaspis pinifoliae PDF (135KB) Aug 5, 2009 2907-1400
PINE SAWYERS (Coleoptera: Cerambycidae, Monochamus sp.) PDF (876KB) Aug 5, 2009
Pine Shoot Beetle PDF (1MB)

Order: Coleoptera

Family: Scolytidae

Species: Tomicus piniperda (Linnaeus)

Size: The adults are 1/8 to 1/4 inch long. The larvae are legless and can be up to 1/4 inch long.

Color: Pine shoot beetles are dark brown. The larvae have a dark brown head and creamy white body.

Description: Pine shoot beetles are in the same family as bark beetles and resemble bark beetles in appearance with their cylindrical shape.

May 1, 2009 444-291
Plumbing Systems of Agricultural Sprayers PDF (1MB)

The plumbing systems of agricultural sprayers are usually considered foolproof. Sprayer problems may occur if plumbing and/or modifications are improperly done or maintenance is ignored. Retrofitting, addition of electrical control systems, and replacement of pumps or nozzles require proper knowledge of the plumbing system and the implications of these changes to sprayer performance. Routine maintenance of the plumbing system is essential.

May 1, 2009 442-452
Potato Aphid on Tomatoes PDF (2MB)

Homoptera: Aphididae, Macrosiphum euphorbiae

Distribution

The potato aphid is found throughout the United States and southern Canada but is only considered a serious pest in the northeast and north central regions of the United States.

May 1, 2009 2901-1031
Problem-free Shrubs for Virginia Landscapes PDF (24MB) May 1, 2009 450-236
Problem-free Trees for Virginia Landscapes PDF (20MB) May 1, 2009 450-237
Root-knot Nematode in Field Corn PDF (1MB)

Order: Tylenchida

Family: Heteroderidae

Species: Meloidogyne incognita (southern root-knot nematode), M. arenaria (peanut root-knot nematode), M. javanica (Javanese root-knot nematode), M. hapla (northern root-knot nematode; not found in corn)

Size: Adult females are up to 1/16 inch in diameter.

Color: Adult females are a translucent cream color.

Description: Adult females are pear shaped and sedentary.

May 1, 2009 444-107
Scale Insects PDF (1MB)

Scale insects are a peculiar group and look quite different from the typical insects we encounter day to day. Small, immobile, with no visible legs or antennae, they resemble individual fish scales pressed tightly against the plant on which they are feeding. There are over l50 different kinds of scales in Virginia. Many are common and serious pests of trees, shrubs, and indoor plants.

May 1, 2009 2808-1012
Slugs in Field Corn PDF (1MB)

Scientific Names: Deroceras reticulatum (gray garden slug) (Fig. 1), Deroceras laeve (marsh slug) (Fig. 2), Arion subfuscus (dusky slug) (Fig. 3)

Size: Mature slugs vary in size from 1/2 inch to several inches in length; however, the typical size range of slugs found in cornfields is about 1/2 to 1 1/4 inches.

Color: Mature slugs are gray to brownish-gray, depending on the species. Immature slugs resemble adults in color (Fig. 4).

May 1, 2009 444-109
Sooty Mold of Conifers and Hardwoods PDF (641KB) May 1, 2009 450-618
Spider Mites PDF (608KB)
Aphids, or plant lice, are small, soft-bodied insects. There are hundreds of different species of aphids, some of which attack only one host plant while others attack numerous hosts. Most aphids are about 1/10 inch long (2.54 mm), and though green and black are the most common colors, they may be gray, brown, pink, red, yellow, or lavender. A characteristic common to all is the presence of two tubes, called cornicles, on the back ends of their bodies. The cornicles secrete defensive substances. In some species they are quite long, while in others they are very short and difficult to see.

Aphids feed in clusters and generally prefer new, succulent shoots or young leaves. Some species, known as wooly aphids, are covered with white, waxy filaments, which they produce from special glands.

May 1, 2009 444-221
Spruce Spider Mite PDF (619KB)

Distribution and Hosts

The spruce spider mite  (Acari: Tetranychidae, Oligonychus unuguis (Jacobi)) lives in all areas of Virginia and is widely distributed throughout the temperate regions of the United States and Canada. It attacks spruce, arborvitae, juniper, hemlock, pine, Douglas fir, Fraser fir, and larch, among others.
May 1, 2009 444-235
Squash Bug PDF (1MB)

Order: Hemiptera

Family: Coreidae

Species: Anasa tristis

Size: The adult is 1/2 to 3/4 inch long.

Color: The adults (Figure 1) are brownish/gray with orange markings along the edge of their abdomens. The nymphs (Figure 2) are a whitish to greenish-gray color with black legs and a dark head. As the nymphs move through their five instars, their color ranges from light greenishgray to dark greenish-gray.

Description: The adults have a flat back. The squash bugs, like stink bugs, produce a foul odor when disturbed. The last two instars have noticeable wing pads and look very similar to adult squash bugs.

May 1, 2009 444-031
Stink Bugs PDF (741KB)

Adults and nymphs suck sap, feeding primarily on buds and seedpods. This feeding results in weakened plants and malformed buds and fruit. On okra and bean pods, the damage appears as pimples or wart-like growths. On tomatoes and peppers, white marks, often resembling halos, appear on the fruit. On pecans and beans, the damage shows up as brown spots on the nutmeat or seed. On some tree fruit, stink bugs can cause a deforming condition called cat facing on the fruit.

May 1, 2009 444-621
Successful No-Tillage Corn Production PDF (838KB) Jul 29, 2009 424-030
Sustaining America's Aquatic Biodiversity - Aquatic Insect Biodiversity and Conservation PDF (1MB) May 1, 2009 420-531
Thrips PDF (93KB)
Adult thrips are small, pale-yellow insects (occasionally black) with elongated bodies, and fringed wings.

Life Cycle

Their life cycle consists of an egg, nymph, pre-pupa, pupa and an adult. The exact time required for thrips to complete their life cycle varies with species, temperature and the host plant. Western flower thrips complete their life cycle, from egg to adult, in approximately 10 days at 80° F. Adults insert eggs in leaf tissue which hatch in approximately three days. Nymphs feed for four to five days and then drop from the plant to pupate in the soil. Adults emerge after two days of pupation and begin feeding.
May 1, 2009 444-281
Tulip Tree Leaf Miner (Sassafras Weevil) PDF (82KB)

Rice-shaped holes about 1/16 inches result from adult feeding. Larval feeding forms mines, usually two per leaf. If they are both on the same side of midrib, one is extensive, and the other dwarfed. If the insect lays eggs on opposite sides of the midrib, both mines develop normally.

May 1, 2009 444-279
Twig Girdler/Twig Pruner, Coleoptera, Cerambycidae: Oncideres cingulata (twig girdler,) and Elaphidionoides villosus (twig pruner) PDF (366KB)

In the larval stage, both the twig girdler and twig pruner are creamy white in color and up to 2 inches in length. They look like typical roundheaded borers in that their heads and bodies are cylindrical in shape and they have legs that are reduced to very small claws. The adult twig girdler is about 5/8 inch long and has a pair of long antennae. The color is brown with irregular patches of fine gray hairs and the antennae are spines on the segments closest to the head.

Nov 20, 2009 2911-1423
Using Pitfall Traps to Monitor Insect Activity PDF (2MB)

Pitfall traps are excellent tools for detecting first activity and monitoring the season-long activity of walking and crawling soil and litter arthropods, especially those that are active at night. Pitfall traps can be used in sampling programs for row crops, orchards, turf, pastures, woodlands, and landscapes.

May 1, 2009 444-416
Virginia, West Virginia and Maryland Cooperative Extension 2009 Spray Bulletin for Commercial Tree Fruit Growers PDF (3MB) May 1, 2009 456-419
Virginia Pine Sawfly, Hymenoptera: Diprionidae: Neodiprion pratti (Dyer) PDF (621KB)

Adults resemble flies yet have four wings instead of two.
Small white oval eggs are inserted into the edge of needles at equally spaced
intervals, but in only one needle fascicle. Newly hatched larvae are pale
green, with black head capsules, and are 3 mm long. Full grown larvae are
spotted or marked with longitudinal black stripes and are from 16 to 23 mm
long. Cocoons for pupation are spun in the litter or soil surface under the
trees.

Nov 20, 2009 2911-1424
Wax Scale PDF (598KB)

Homoptera: Coccidae, Ceroplastes ceriferus

Plants Attacked

Wax scale has well over 50 hosts, especially Japanese and Chinese hollies, pyracantha, spirea, ivy, hemlock, euonymus, and boxwood.

Description of Damage

Infestations seldom kill plants directly, but seriously weaken them, reduce growth, and cause decline. Deposits of honeydew give rise to rampant growth of the black sooty mold fungus, particularly on burford and Chinese holly.

May 1, 2009 444-622
Whiteflies PDF (90KB)
Whiteflies are white insects with pale yellow bodies that are approximately 2 mm long. They belong to the order Homoptera and are close relatives of aphids, scales, mealybugs, hoppers and cicadas.

Life Cycle

The life cycle consists of an egg, 4 nymphal instars, a pupal and an adult stage. Depending on the species and environmental conditions, eggs require 10-12 days to hatch, and completion of life cycle from egg to adult takes 30-40 days. Nymphal instars behave in a manner similar to scale insects. The first nymphal instars are active and they are sometimes called crawlers. The remaining nymphal instars are sedentary and may mimic immature scales.
May 1, 2009 444-280
White Pine Weevil PDF (617KB)

Distribution and Hosts

The white pine weevil (WPW) is found throughout Virginia. Its preferred hosts are eastern white pine and Norway spruce, but it can attack Scotch and other pines as well.

Description of Damage

The WPW usually attacks only the upright terminal leader. The previous year¹s leader (first whorl) and the new growth both die from the attack. Damage is first evident in March or early April when overwintering females chew holes in the leader for feeding and egg laying. These holes, eight inches to ten inches below the terminal bud, produce resinous bleeding that eventually dries to a white crust. By late May or early June, the larval damage is evident as the current year¹s leader droops like a shepherds crook, turns pale yellow and then brown. In July, the attacked shoot will have 1/8-inch diameter exit holes and tunnels and sawdust under the bark. A lateral shoot will eventually take over as the terminal leader but may have to be trained and have competing shoots removed. Trees of medium size, four feet to 40 feet, are most commonly attacked. WPW is a serious pest of forest plantations, Christmas tree farms, yard plantings, and landscapes.
May 1, 2009 444-270
Wireworm Pest Management in Potatoes PDF (298KB)

Wireworms are the subterranean larval stage of click beetles (Coleoptera: Elateridae). They are pests of many agricultural crops including corn, sorghum, small grains, tobacco, and various vegetables, but are particularly damaging to potatoes, since the marketable portion of that crop is in the soil. Wireworms are found throughout the world, and species vary greatly across regions. In Virginia, three important pest species of agricultural crops are the corn wireworm, Melanotus communis, the tobacco wireworm, Conoderus vespertinus, and a related species, C. lividus (Fig. 1). A field survey of more than 60 fields in eastern Virginia from 2002 to 2004 revealed that 80% of wireworms collected were the corn wireworm, M. communis. This is the primary soil pest attacking potatoes in Virginia.

May 1, 2009 2812-1026