"Spongy moth (Lymantria dispar; formerly called gypsy moth), is an invasive pest of hardwood trees in forests and yards. The caterpillars prefer the foliage of oak and other shade trees, but also attack conifers. Spongy moth caterpillars can defoliate large trees during outbreaks, and most homeowners object to the numerous hairy caterpillars and their abundant droppings raining out of infested trees. Since its introduction to Massachusetts in 1869, spongy moth has spread throughout the northeastern US, down in the mid-Atlantic, around the Great Lakes, and into Canada. Most of Virginia is generally infested with spongy moth, but it may not cause widespread defoliation every year."

The pine bark adelgid was introduced from Europe and is now widely distributed in North America, occurring principally throughout the native range of eastern white pine. This insect is also found on Scots and Austrian pine.

Heavily infested trees will have large numbers of scales on twigs and branches. Scales may also be found on exposed roots and on the trunk of young trees. Scale insects feed on plant sap with their long thread-like mouthparts (stylets), which are several times longer than the insect itself.

Seeds themselves are a very nutritious form of food because they contain proteins, carbohydrates, vitamins, minerals, and oils that a beginning plant needs to grow. Many of these nutritious components are increased greatly when the seeds are sprouted.

The nursery industry in Virginia has enjoyed an extended period of growth and expansion. Consequently, there is considerable interest in and some potential for new business opportunities in the industry. Another consequence of this period of economic growth is an increase in competition within the industry to supply the growing demand for landscape plants. Those interested in getting into the nursery business are strongly encouraged to invest their time and energy into learning as much as they can about the modern nursery industry, and the many options now available in nursery production, before they invest any money in facilities and operations.

Increased fuel costs and colder than normal winters make heating costs a significant burden on many greenhouse operations. So, how can growers deal with high energy costs in the greenhouse? This publication covers energy conservation, alternative fuel choices, growing temperatures and production practices.

Spider mites (Family Tetranychidae, Order Acari) are not insects; they are closely related to spiders, harvestmen (daddy longlegs), and ticks. Unlike insects, which have six legs and three body parts, spider mites have eight legs and a one-part body. They also lack wings, antennae, and compound eyes. Individual spider mites are almost microscopic, yet when they occur in large numbers, they can cause serious damage. Dozens of species attack shade trees, shrubs, and herbaceous plants.

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.

Verticillium wilt is a serious vascular wilt disease affecting many shade tree species and over 80 tree genera, as well as many woody ornamental landscape plants, and herbaceous and vegetable plants. Verticillium wilt most commonly occurs in nursery, orchard and landscape locations. Maple (Acer spp.) are a tree genus commonly associated with the disease, but Verticillium wilt occurs on many other trees and woody ornamentals used in landscapes. Verticillium wilt more commonly occurs in locations with colder climates than Virginia; however, Verticillium wilt does cause disease on trees and woody ornamentals in Virginia.

Pesticide sprays consist of at least 95% water. Water quality plays an important role in pesticide performance. The following issues may indicate a compatibility problem with pesticides and spray water quality: - Pesticide does not work at labeled rates; - Difficulty mixing sprays or clogging of nozzles; - Inconsistent pest control observed in fields or plots; - Pests seem resistant to a new pesticide active ingredient, or - Crops are lower quality or lower yielding. Understanding how water quality characteristics such as pH, water hardness, turbidity, and total suspended solids affect the adsorption and persistence (half-life, storage time) of a pesticide can help pesticide applicators reduce or eliminate compatibility issues and improve pesticide effectiveness

Mixing two or more pesticide products can allow for the treatment of several pests at the same time, improve pesticide performance, and ultimately saving time and money. However, physical and chemical tank mix incompatibilities can occur when combining two or more pesticides. Physical incompatibility is the failure of pesticide products to stay uniformly mixed and can result in layering, products settling out of solution, or clumping. A chemical incompatibility is the result of a chemical reaction between pesticide products. A chemical incompatibility is less visible and can be harder to detect. This publication focuses on basic factors that influence product compatibility (agitation speed and method, water temperature, mixing order, carrier type, and chemical formulations) and summarizes best mixing practices to address these factors.

Spray water problems may arise due to water quality and management decisions. Certain aspects of water quality can reduce the efficacy of the pesticide as well as affect how the pesticide interacts with the plant surface or targets pests. Evaluating and testing spray water chemistry can help identify water quality problems that might otherwise be overlooked. This publication will examine possible solutions to spray water problems, including the use of adjuvants and other additives to enhance pesticide performance.

Sugarcane beetle is a sporadic but serious pest of several crops in Virginia. Although an occasional pest, outbreaks can lead to substantial losses in crops and property damage. It can cause significant damage to corn, sugarcane, rice, sweetpotato, and turfgrass, and has also been reported on strawberry, cotton, rose, and wild grasses. Populations in southern states may flare to levels that become a nuisance as it gathers at light sources. Its life cycle spans one generation per year, with adults becoming active in late spring. These beetles primarily feed on plant roots and management involves cultural practices and chemical control, focusing on targeting adult beetles to reduce crop damage. Further research is needed to develop effective pest management strategies that rely less on chemical control tactics.

Cankerworms are also known as inchworms, loop worms, and spanworms - this is credited to their distinctive way of moving. In order to travel, a cankerworm must grab leaves or branches with its front legs and then pull the rest of its body forward. This causes the abdomen area to contract and gives the worm the appearance of arching its back.

The Japanese maple scale is an armored scale, considered a key pest, causing the nursey industry significant losses due to direct injury or plant rejection. Identify JMS can be difficult due to their biology. This factsheet serves as a pictorial guide to provide key features of this insect.

Box tree moth (BTM), Cydalima perspectalis (Walker), is a destructive pest of boxwood (Buxus spp.). Native to Asia, BTM spread to Europe in 2006 and into Canada in 2018. BTM was found in New York in 2021, Michigan in 2022, and Ohio in 2023. It has not yet been found in Virginia. BTM feeds on all species of Buxus. Boxwood is a favored ornamental and a staple evergreen shrub cultivated in the US horticultural trade. This fact sheet was developed to help you identify BTM and some of the insects that could be mistaken for it in Virginia.

Arborvitae leafminer (Argyresthia thuiella; Lepidoptera: Argyresthiidae) is a small moth that attacks arborvitae (Thuja occidentalis), its cultivars, and sometimes false cypress (Chamaecyparis sp.). Native to North America, it was originally found in the the native host range of arborvitae in the upper Midwest, northeastern US, and adjacent Canada. It has since spread, presumably through the horticultural trade, to other parts of the US, Canada, and Europe.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Assessing On-Farm Produce Safety Risks Modules are a series of nine videos to assist you in creating a food safety program and preparing you for a GAP audit. These videos are based off of a series of seven factsheets (FST-400NP through 406NP) available through Virginia Cooperative Extension. In this module, we are going to explore how food safety can play into market access, the ways market sectors are similar and different from each other in terms of requirements, and why it is important to always recognize that there is not a ‘one size fits all’ for food safety standards across market sectors.

Container-grown plants are constrained with regard to root growth, and are affected by factors including container size, substrate, weather, nutrition, and irrigation. Typical soilless substrates will hold less plant-available water than a typical field soil, making water management a critical component of any container-grown plant production system. A well-designed and managed irrigation system, which works in concert with the aforementioned factors, can provide the necessary quantity of water to support plant growth in an efficient manner.

According to the United States Department of Agriculture 2012 Census of Agriculture, sales from greenhouse-grown food crops equaled around $800 million in the U.S. Crops grown included tomatoes, lettuce, cucumbers, peppers, and berries, with hydroponic production operations making up about 64% of the total production (cwt) (USDA Census of Agriculture, 2012). Demand for greenhouse-grown produce continues to increase, providing growers with unique opportunities to tap into this expanding market. Although greenhouse systems provide a more protected environment than field-grown systems, it is important to understand the unique food safety risks and possible sources of contamination when growing produce in these systems. Identifying food safety hazards are necessary to implementing practices that reduce the risk of contamination during the pre-plant, production, harvest, and post-harvest handling stages. Use the checklist below to guide you in asking important questions targeting possible risks at each of the greenhouse system stages.

"Low Tunnels in Vegetable Crops: Beyond Season Extension" is a comprehensive document that delves into the multifaceted benefits of micro tunnels in vegetable cultivation, encompassing not only extended growing seasons but also improved yield, pest management, and resource efficiency, making it an essential resource for modern sustainable farming.

Plant growth regulators (PGRs) are chemicals that are designed to affect plant growth and/or development (figure 1). They are applied for specific purposes to elicit specific plant responses. Although there is much scientific information on using PGRs in the greenhouse, it is not an exact science. Achieving the best results with PGRs is a combination of art and science — science tempered with a lot of trial and error and a good understanding of plant growth and development. good understanding of plant growth and development.

Boxwood blight is a devastating disease of boxwood that results in defoliation and decline of susceptible boxwood. This best management practices factsheet provides guidelines for home growers of landscape boxwood to avoid introduction of the boxwood blight pathogen into a landscape or, if the disease is already present in a landscape, to manage to disease in the most effective manner and avoid spread of the disease to new locations.

To provide leadership in safeguarding and protecting the ornamental horticulture industry, historical gardens and landscape plantings from boxwood blight.

This Best Management Practice document is a set of guidelines for home growers of landscape boxwood to avoid introduction of the boxwood blight pathogen into a landscape or, if the disease is already present in a landscape, to manage the disease in the most effective manner and avoid spread of the disease to new locations.

This Best Management Practice document is a set of guidelines for home growers of landscape boxwood to avoid introduction of the boxwood blight pathogen into a landscape or, if the disease is already present in a landscape, to manage the disease in the most effective manner and avoid spread of the disease to new locations.

This Best Management Practice document is a set of guidelines for home growers of landscape boxwood to avoid introduction of the boxwood blight pathogen into a landscape or, if the disease is already present in a landscape, to manage the disease in the most effective manner and avoid spread of the disease to new locations.

Herbicides that are usually associated with contamination of straw/hay, turf clippings, manure, and composts are growth regulator herbicides or synthetic auxins, a group of herbicides that mimics plant hormones and regulates growth. These herbicides are labeled for control of broadleaf weeds in grass crops, such as pastures and corn; in turfgrass, including lawns, golf courses, parks, and highway turf; and in noncrop areas. Vegetable and fruit crops, as well as broadleaf ornamentals can inadvertently be injured by these chemicals through drift of spray droplets, volatilization, and spray tank contamination or by residues in straw, manure, turf clippings, or compost. Diagnosing the specific herbicide responsible for the plant damage can be difficult. This publication focuses on damage caused by herbicide residues.

According to the 2017 Census of Agriculture, U.S. greenhouse vegetable farms more than doubled from 2012 (USDA 2019). Virginia fell within the top 10 states for acreage of vegetables and berry crops grown under protected culture. Protected culture includes greenhouses and structures like high tunnels. With close to two and a half million square feet devoted mostly to tomatoes, vegetables, herbs, and strawberries, the value of Virginia greenhouse sales in 2017 was over 31 million dollars! A lot of this increase in square footage was due to the addition of large operations coming into Virginia.

With the increasing number of controlled environment agriculture farms, Virginia Cooperative Extension is working closely with specialty crop growers to address the challenges of establishing and managing hydroponic greenhouse operations. Growers interested in producing food crops in controlled environments can use several different types of hydroponic systems. One of the most common types of hydroponic systems is called nutrient film technique (NFT).

This factsheet is part of a series of seven factsheets targeting beginning farmers growing edible crops using hydroponic greenhouse systems. There are also five videos that are related to the factsheets and included in the numbering sequence.

Understanding the fundamental aspects of melon physiology and morphology is essential for optimizing its cultivation, improving yield, and enhancing fruit quality. This document provides a concise overview of the key physiological and morphological characteristics of the basic melon plant, highlighting its growth and development processes. The physiological aspects encompass various essential factors that influence melon growth, including photosynthesis, water relations, nutrient uptake and assimilation, and hormone regulation. Melon plants exhibit distinct physiological responses to environmental stimuli such as light, temperature, and water availability, which directly impact their growth, flowering, and fruiting. An understanding of these physiological processes aids in implementing appropriate cultivation practices and management strategies for maximizing melon productivity.

Cicada killers (Sphecius speciosus) are quite large and menacing-looking ground nesting wasps that look very menacing to the general public, but are actually quite docile insects unless disturbed. As their name implies, they are a beneficial predator of cicadas. This publication details their identification and management strategies.