- 522 - 



discolored first 2-5 leaves; also infested late-planted sorghum. Found from whorl 

 throughout plant. Some controls applied. (Peters). KANSAS - Economic in some 

 sorghum surveyed in Geary, Anderson, Osage, Leavenworth, and Wyandotte Counties. 

 Counts per plant ranged by county (number fields surveyed per county in paren- 

 theses) : Geary 200-1,250 (3); Wabaunsee 250-300 (2); Johnson 200-1,000 (3); 

 Douglas 200-600 (3); Franklin 200-1,000 (3); Osage 500-1,000 (2); Coffey none 

 (1); Anderson 3,500 (1); Riley 8.5-200 (4); Pottawatomie 10-200 (3); Leavenworth 

 1,200-2,000 (2); Wyandotte 1,650 (1); Stevens 80 (1); Kearny 0-3 (2); and 

 Wichita, 3-4 (2) . In 3 fields in Geary County surveyed last week and again this 

 week, populations (per plant) increased as follows: From 630 to 1,250; from 60 

 to 950; and from 35 to 200. Parasitism less than 4 percent in these fields. 

 (Bell). 



OKLAHOMA - Schizaphis graminum ranged 500-1,000 per plant in scattered grain 

 sorghum in Ottawa County. Averaged 100 per plant in field in Craig County. Ranged 

 up to 250 per plant on grain sorghum in scattered fields in Texas and Cimarron 

 Counties. Heaviest usually in older fields while younger fields seldom averaged 

 more than 100 per plant. Ranged 0-50 per plant in few fields in western Beaver 

 County. (Okla. Coop. Sur.). ARKANSAS - Found in sorghum field in Clay County and 

 in 2 Greene County fields. This is a new county record in Clay County. Infesta- 

 tions light and scattered. (Boyer) . MISSISSIPPI - Moderate on sorghum in Leflore 

 County. (Sartor, July 9) . 



HORNWORMS (Manduca spp.) - MICHIGAN - M. quinquemaculata (tomato hornworm) and 

 M. sexta (tobacco hornworm) collections at all blacklight stations indicate these 

 pests earlier and more abundant than normal. (Newman). MARYLAND - Infestations of 

 M, quinquemaculata and M. sexta ranged 1-5 percent in most tobacco in Charles, 

 "Prince Georges, Calvert, and St. Marys Counties. (U. Md., Ent. Dept.). KENTUCKY - 

 M. sexta larvae damaged tobacco in Pulaski County; defoliation 20 percent at one 

 "location. Infestation light on tobacco in Trigg County. (Barnett) . 



POTATO LEAFHOPPER ( Empoasca fabae ) - VERMONT - Increased on legumes period ending 

 July 13. (Nielsen). MARYLAND - Heavy and spotty, mostly 0-10 per sweep. Heaviest 

 (800 acres) ranged 20-50 per sweep of alfalfa in Baltimore, Harford, Carroll, and 

 Frederick Counties. Some yellowing in heaviest infested fields in Frederick 

 County. Ranged 0-10 per sweep of alfalfa east of Kent County on Eastern Shore. 

 (U. Md., Ent, Dept.). WISCONSIN - Generally light throughout northeastern area 

 and averaged about 3 per sweep in central area. (Wis. Ins. Sur.). 



TOBACCO BUDWORM ( Heliothis virescens ) - MARYLAND - Tobacco plants infested with 

 second and third instars ranged 1-4 percent in many areas of St. Marys, Calvert, 

 Anne Arundel, and Prince Georges Counties. (U. Md., Ent. Dept.). TENNESSEE - Very 

 light in tobacco areas surveyed in Robertson and Greene Counties. Parasitism 

 heavy. (Pless, Eisler) . 



CORN, SORGHUM, SUGARCANE 



EUROPEAN CORN BORER (Ostrinia nubilalis ) - NORTH CAROLINA - Spot checks in 23 

 fields of sweet and field corn (silking stage or beyond) in Nash, Wilson, 

 Edgecombe, Martin, and Bertie Counties indicate about 2 percent infestation by 

 first generation. Second-generation larvae appearing; however, little loss 

 expected. (Hunt). KENTUCKY - Larvae damaged corn in Trigg County; infestation 

 10-30 percent. (Barnett). MARYLAND - First-brood larvae continue to pupate 

 throughout Eastern Shore. No pupation west of Chesapeake Bay. Infested stalks 

 throughout State ranged 0-10 percent depending on age of corn. Heavy in all areas 

 of State. (U. Md., Ent. Dept.). DELAWARE - Adults averaged 19 per night in black- 

 light traps. Infestations averaged 10 percent in field corn in New Castle County, 

 most in third and fourth instar. Eggs in Sussex County on peppers. (Burbutis) . 

 OHIO - Borers infested 10-75 percent of corn plants in Tuscarawas County. 

 (Veley) . Larvae beginning to burrow into tassels and stalks. Spraying at this 

 time no longer effective. (Andress) . MICHIGAN - First-generation adult emergence 

 complete at all blacklight stations. Counts dropped to 2 moths at Lenawee County 

 station. Larval activity persists with most boring into host plants. Potatofields 



