S. Tiwari
| Title | Summary | Date | ID | Author(s) | |
|---|---|---|---|---|---|
| Asiatic Garden Beetle in Field Corn |
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 | ||
| Japanese Beetle in Field Corn |
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 | ||
| Root-knot Nematode in Field Corn |
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 |