- 508 - 



WESTERN CORN ROOTWORM ( Diabrotica virgifera ) - COLORADO - Larvae damaged untreated 

 corn in Boulder and Weld Counties. (Rothman, Hantsbarger ) . MISSOURI - Adults 

 averaged 10 per plant in one field in Barton County. Larvae and pupae in fields. 

 (Huggans, Keaster). No other infestations observed in southwest area. (Munson) . 

 IOWA - Adult collected at Ames, Story County, on July 6, earliest recorded date 

 for emergence on this plot. (Iowa Ins. Sur . ) . NORTH DAKOTA - Root damage evident 

 on corn in Richland County. (McBride) . 



CORN FLEA BEETLES ( Chaetocnema spp.) - ARIZONA - C. ectypa (desert corn flea 

 beetle) medium to heavy with leaf damage in some sorghum fields in Yuma County. 

 (Ariz. Coop. Sur.). ALABAMA - C. pulicaria (corn flea beetle) and other flea 

 beetles statewide on corn and may be vector of scattered infections of Stewart's 

 disease in corn. (McQueen). MARYLAND - C. pulicaria increasing in Baltimore, 

 Harford, and Frederick Counties. Heaviest counts 5-6 per leaf in late whorl stage 

 corn near Churchville, Harford County. Damage levels ranged 8-15 percent in 

 central areas. (U. Md . . Ent. Dept . ) . 



MAIZE BILLBUG ( Sphenophorus maidis ) - MARYLAND - Destroyed 80 percent of 3-acre 

 stand of corn near Kennedyville , Kent County. (U. Md . . Ent. Dept.). 



SORGHUM MIDGE (Contarinia sorghicola ) - ALABAMA - Occasional adult in 10 early 

 blooming grain sorghum fields in Dallas and Montgomery Counties. (McCabe et al.). 

 ARKANSAS - Did not average more than 1 per 100 heads of sorghum in 14 of 26 

 fields in Jackson, Cross, Woodruff, Conway, and Pope Counties. Light in east- 

 central and northeast areas. (Boyer) . TEXAS - Infesting late grain sorghum in 

 De Witt, Jackson, and Refugio Counties. Spotted infestations in Brazos, Robertson, 

 and Burleson Counties. Adults from Milam, Williamson, Bell, Hill, and McLennan 

 Counties. Populations increased in most north-central counties. (Cole et al.). 

 MISSOURI - Light (2-4 per head) on newly emerged sorghum heads in southeast area. 

 (Houser) . 



SEEDCORN MAGGOT ( Hylemya platura) - VERMONT - Much damage to sweet corn at 

 Bennington County"! (Nielsen) . 



BANKS GR-i^SS MITE ( Oligonychus prat ens is ) - TEXAS - Heavy on corn in El Paso 

 County. Lower 6 true leaves on most plants destroyed. Mites started building up 

 in larger numbers on crops about 7 days prior to tasseling stage. (Neeb) . 



CHINCH BUG (Blissus leucopterus leucopterus ) - KANSAS - Ranged 0-25 (averaged 6) 

 per plant in field of 4-inch sorghum in Dickinson County. Treatment in sorghum 

 reported in Dickinson, Marion, Harvey, Shawnee, Wilson, and Crawford Counties. 

 (Bell). 



YELLOW SUGARCANE APHID (Sipha f lava ) - ARKANSAS - Very light on sorghum in 

 Woodruff County. This is a new county record. (Boyer). 



SMALL GRAINS 



EUROPEAN CORN BORER ( Ostrinia nubilalis ) - NEBRASKA - Damaged scattered oat fie Ids 

 in northeast district"! Up to 4 percent of culms bored into and lodged in 3 fields 

 in Knox and Pierce Counties. Third to last instar. (Kumpost et al.). 



A FIELD CRICKET (Acheta assimilis ) - NORTH DAKOTA - Nymphs 6 per square yard in 

 alfalfa, soybeans, and small grain in Cass County. (Brandvik) . 



TURF, PASTURES. RANGELAND 



SAGEBRUSH DEFOLIATOR (Aroga websteri ) - NEVADA - Infested almost all sagebrush 

 in Pine Valley, Eureak County; expect complete defolation. (Lauderdale). 



