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BANKS GRASS MITE (Oligonychus pratensis ) - TEXAS - This reporting period counts 

 heavy and increasing on grain sorghum in El F'aso, Reeves, and Pecos Counties. 

 Isolated fields in Reeves County show 80-95 percent of total leaf surface 

 desiccated. Few heavily infested fields in Reeves County had sorghum heads 

 completely webbed. (Neeb) . OKLAHOMA - Heavy infestations still in scattered 

 grain sorghum in Texas County. (Okla. Coop. Sur.). COLORADO - Declining in most 

 Arkansas Valley areas; many fields show some damage. (Schweissing) . WYOMING - 

 Damage continues heavy in many cornfields in Big Horn, Park, Hot Springs, 

 Platte, and Goshen Counties. (Burkhardt) . 



EUROPEAN CORN BORER (Ostrinia nubilalis ) - DELAWARE - Adults averaged 12 per 

 night in blacklight trap at Bridgeville, Sussex County, lesser flights elsewhere. 

 About 75 percent of egg masses on sweet corn at Georgetown September 13, 

 parasitized by Trichogramma sp. (a minute egg parasite). (Davis), WEST VIRGINIA - 

 Surveys indicate populations in Cabell, Mason, Putnam, Jackson, and Wood Counties 

 averaged less than one larva per stalk with less than 20 percent infestation, 

 (W. Va. Ins. Sur.). NORTH CAROLINA - Heavy infestation over entire State. Average 

 infestation is about 30 percent. County averages range from 6 percent on stalks 

 infested to 70+ percent. Little lodging has occurred. (Hunt). WISCONSIN - Larvae 

 numerous in individual late sweet corn in southern and northeastern counties. 

 Most larvae in third, fourth, and fifth instars. (Wis. Ins. Sur.), IOWA - Moth 

 flights peaked in Polk County September 11 and in Boone County September 10, Most 

 corn unattractive to third-generation moth egg laying. (Iowa Ins. Sur.). 

 NEBRASKA - Second-generation larval infestations 92-100 percent in Saunders and 

 Dodge Counties. Larvae ranged 250-850 per 100 plants. (Roselle) . KANSAS - Percent 

 infested corn plants in 4 fields: Up to 72 percent in Stanton County, up to 28 

 percent in Finney County, and up to 28 percent in Scott County. No lodging or ear 

 drop noted. Scott and Stanton are new counry records. Determined by M.L. Shuman. 

 (Bell) . 



NORTHERN CORN ROOTWORM (Diabrotica longicornis) - WEST VIRGINIA - Adults 10-30 

 per stalk; damage moderate to tassels and silk in Mason County, September 14. 

 Collected by J,D. Hacker. This is a new county record. (W. Va, Ins. Sur.). 

 VIRGINIA - Adults reported from alfalfa field in Floyd County August 19, 1971, 

 Specimens collected on August 27, 1971 from this field. Collected by W.A. Allen, 

 Determined by R.E. White. This is a new State record. (Alien). NEW HAMPSHIRE - 

 Adults on sweet corn silks at Durham, Strafford County. (Morse). 



SORGHUM MIDGE (Contarinia sorghicola) - MISSOURI - Damaged late-planted sorghum 

 throughout southeast area. Some very late sorghum will not be harvested. (Munson) . 

 OKLAHOMA - Continues heavy in late grain sorghum in Wagoner County. Heavy in few 

 fields in Payne County, light adult populations seen. (Okla. Coop. Sur.), 



FALL ARMYWORM (Spodoptera frugiperda ) - OKLAHOMA - Up to 80 percent of ears 

 girdled at base in scattered corn in Texas County, (Okla. Coop. Sur.). 



TWOSPOTTED SPIDER MITE ( Tetranychus urticae ) - WASHINGTON - Heavy in most field 

 corn in central Columbia Basin area. (Klostermeyer) . 



SMALL GRAINS 



FALL ARMYWORM (Spodoptera frugiperda ) - TEXAS - Heavy in Wilbarger, Wichita, 

 Dickens, Shackelford, Throckmorton, Young, and Baylor Counties. Damage heavy on 

 early planted small grain in some cases. Larvae completely destroyed 40 acres of 

 wheat in Dickens County. (Boring). 



WHEAT STEM SAWFLY (Cephus cinctus ) - NORTH DAKOTA - Survey of wheat stubble for 

 cutting completed in 12 counties. Cut stems ranged up to 15.7 (averaged 0.8) 

 percent. Slight increase from 0.7 percent in 1970. Cutting evident in 54 percent 

 of fields this year and 52 percent in 1970. (Brandvik, Kaatz) . 



