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WESTERN BEAN CUTWORM ( Loxagrotis albicosta ) - NEBRASKA - Adults in central and 

 southwestern counties. Egg masses on 12 percent of plants in one field at 

 Imperial. (Roselle) . COLORADO - Moth catches declining in northeastern areas. 

 Many egg masses hatched, some fresh egg masses produced. Some fields averaged 

 one egg mass (hatched and unhatched) per plant. Control undei'way, (Hantsbarger, 

 Pilcher) . KANSAS - Egg masses on 5 percent of plants in field of silking corn 

 in Wichita County. Many eggs hatched, young larvae feeding in tassels. Few egg 

 masses found in corn in Cheyenne, Rawlins, and Greeley Counties. First instars 

 feeding on ear shucks in cornfield in Greeley County. (Bell). 



CORN ROOTWORMS ( Diabrotica spp.) - WISCONSIN - Adults increasing; up to 5 per 

 ear in parts of Rock County. Leaf damage apparent where B. vergif era (western 

 corn rootworm) dominant; mostly this species in Grant, Iowa, and Dane Counties. 

 D. vergif era more prevalent in Rock County than in 1970; noted as far north as 

 "Portage County. No D. longicornis (northern corn rootworm) or D. vergif era 

 noted in extreme northwestern counties. (Wis. Ins. Sur . ) . ILLINOIS - Emergence 

 of D. longicornis and D. vergif era adults very rapid. Adults feeding on silks in 

 man'y cornfields in norThwestern areas. Control recommended if field less than 

 50-percent silked and 5 or more adults per plant. (Sur. Bui.). MINNESOTA - D. 

 vergifera and D. longicornis adults found in heavier numbers throughout southern 

 counties. Most""counts light; usually 1 or 2 per 10 plants. (Minn. Pest Rpt.). 

 KANSAS - Diabrotica spp. adults generally less than 1 per plant in silking corn 

 in northwest and west-central districts, up to 5 per plant in corn in east- 

 central district. (Bell). MISSOURI - Adults in northeast area ranged 20-140 per 

 100 plants. Heaviest counts averaged 111 D. longicornis and 40 D. vergifera per 

 100 plants. (Thomas). Counts in Lincoln County showed less than 20 percent of 

 plants infested with less than 1 adult per plant. Field in Lincoln County showed 

 100 percent infestation of D. longicornis adults, averaged 7.6 per plant. Field 

 in Lewis County had 50 perc'ent of plants infested with 2 per plant. (Huggans) . 

 OKLAHOMA - D. virgif era adults ranged 2-8 per plant on corn in Cimarron County. 

 (Okla. CoopT Sur. ) . UTAH - Diabrotica spp. damage severe in corn planting at 

 Richmond, Cache County. (Roberts, Knowlton) . Adults feeding on silks of corn in 

 infested area of Weber County. (Roberts, Rogers). 



CORN FLEA BEETLE ( Chaetocnema pulicaria ) - MARYLAND - Damage levels continue to 

 increase in Frederick, Carroll" and Montgomery Counties. Field corn (400 acres) 

 in Emmitsburg and Braddock Heights area of Frederick County required controls. 

 Injury statewide remains subeconomic. (U. Md,, Ent . Dept.). 



SORGHUM MIDGE ( Contarinia sorghicola ) - TEXAS - Increasing in Haskell and Knox 

 Counties. Very light emergence from grain sorghum head samples. Overall midge 

 population extremely light. Due to large acreage of late-planted grain sorghum, 

 midge infestations may still develop in August. Midge emergence observed from 

 Johnson grass samples collected in Briscoe, Castro, and Parmer Counties. 

 (Daniels et al.). ILLINOIS - Damage to sorghum reported in southern areas. 

 (Sur. Bui.) . 



BANKS GRASS MITE (Oligonychus pratensis ) - COLORADO - Common in many cornfields 

 in northeastern areas. Generally light with only bottom leaves infested. Control 

 underway. (Hantsbarger, Pilcher). TEXAS - Light in grain sorghum in several 

 counties. Most activity in Bailey and Lamb Counties. Infestations appeared to 

 decrease during cool, rainy weather past few days. In most instances, infesta- 

 tions in grain sorghum below damaging levels and did not warrant control. Light 

 in Pecos and Reeves Counties. Increased on most crops in El Paso County, (Neeb, 

 Rummel) . 



SMALL GRAINS 



HESSIAN FLY (Mayetiola destructor ) - KANSAS - Wheat loss for 1971 estimated at 

 3,031,030 bushels; about 4 times that of 1970. Areas with highest losses: 

 Central, north-central, south-central, west-central, and southwest. Statewide, 

 samples from resistant varieties averaged 0.6 percent infested clums, samples 

 from susceptible varieties averaged 8.1 percent. (Bell). 



