- 656 



SPOTTED ALFALFA APHID ( Therioaphis maculata) - OKLAHOMA - Light (10-20 per 10 

 sweeps) of alfalfa in Caddo, Washita, and Kiowa Counties. (Okla. Coop. Sur.). 

 KANSAS - Light in alfalfa in southeast, south-central, and west-central districts, 

 Averages per 10 sweeps ranged as follows by county (number fields in parentheses) ; 

 Harvey, 5 (1); Sedgwick, 8-25 (3); Sumner, 10-60 (3); Cowley, 8-30 (5); Butler, 

 5-20 (2) J and Scott, 4 (1). (Bell). COLORADO - Increased in Arkansas Valley and 

 found to some extent in every field. Heaviest in Crowley, eastern Bent, and 

 Prowers Counties; ranged 100-5,000 per 100 sweeps. (Schweissing) . NORTH DAKOTA - 

 Wingless adults and nymphs collected from several alfalfa fields in southern 

 Dickey County. Populations less than 1 per 100 sweeps. This is first record for 

 Dickey County. First recorded in State in La Moure County during 1962. (Kaatz) . 



CORN, SORGHUM, SUGARCANE 



EUROPEAN CORN BORER ( Ostrinia nubilalis ) - KANSAS - In Brown County, mostly last 

 instar second-generation larvae found and no pupae or evidence of second-genera- 

 tion pupation. May not be partial third generation in this area as occurred in 

 1970. Field of late corn (milk-stage) in Marshall County, observed some late 

 third and early fourth instar larvae in addition to last instar larvae. Second- 

 generation borers infested 5-20 percent of stalks. (Bell). NEBRASKA - Very light 

 in 11 cornfields in Loup, Brown, Rock, and Keya Paha Counties. (Berogan) , 

 About 30 percent of plants examined in 10 cornfields in the McCook area (Red 

 Willow County) infested with second-brood borers. (Campbell). IOWA - Second- 

 brood borers, 80 percent fifth instar and 20 percent fourth instar on September 

 3. One fresh male moth caught in light trap at Ankeny night of September 1, and 

 one fresh female moth night of September 2, indicating that some pupation 

 occurred but probably less than 1 percent. (Iowa Ins. Sur.). WISCONSIN - Light 

 in Outagamie, Dodge, and Rock Counties. No larvae found in 150 ears of sweet 

 corn checked at one Dodge County site. Up to 25 percent of plants show ear 

 feeding in individual fields in Grant County. Second-generation borers range 

 from egg to fourth instar in southern and southwestern areas, third instar larvae 

 most prevalent. Fresh egg masses on late field corn ranged 0-8 per 100 plants in 

 southwestern area. Threat to sweet corn nearly passed in southern areas. (Wis, 

 Ins. Sur.). MICHIGAN - Adult emergence declining at all blacklight stations. 

 Highest moth count 127 from Monroe County station. Other weekly county totals: 

 Lenawee 62; Berrien 65; Ottawa 88; Oceana 46; Bay 38; and Montcalm 18. (Newman). 



OHIO - Second-generation larvae of Ostrinia nubilalis emerged in northern areas. 

 (Andress) . DELAWARE - Adults averaged 82 per night at Bridgeville, Sussex County. 

 (Burbutis, Lesiewicz) . MARYLAND - Most infested fields range above 25 percent. 

 Moth flights decreasing. Adults ranged 4-10 per night in Dorchester and Queen 

 Annes Counties light trap. (U. Md., Ent . Dept.). First and second instar larvae 

 in snap beans in Dorchester and Wicomico Counties. Canners condemned 1,500 cases 

 ($4,500) due to presence of borers in cans. (U. Md., Ent. Dept.). ALABAMA - 

 Larvae heavy and tunneling in stalks of grain sorghum near Cottonwood in Houston 

 County on August 20. This is a new county record. (Wilson et al.). 



NORTHERN CORN ROOTWORM (Diabrotica longicornis ) - PENNSYLVANIA - Adults 1-40 per 

 stalk in field corn (moderate to heavy) feeding on silks and tassels; damage 

 light in Rock Spring, Centre County. (Adams). MARYLAND - Heaviest adult counts 

 ranged 1-4 per 100 silks of corn. (U. Md., Ent. Dept.). NORTH CAROLINA - Adults 

 light on fresh silks in McDowell, Watauga, Burke, Caldwell, and Iredell Counties. 

 These are new county records. (Hunt). 



WESTERN CORN ROOTWORM (Diabrotica virgifera ) - MICHIGAN - Adults taken on August 

 12 by T. Drozd in Allegan County. Determined by R. Ruppel . This is a new State 

 record. Adults taken in Cass County on August 31, for a new county record. 

 (Ruppel, Sackrider) . 



CORN ROOTWORMS (Diabrotica spp.) - WISCONSIN - Adults migrating from older corn 

 into younger corn, small grains, and alfalfa. Field with average of 5 adults per 

 ear last week had only one per ear this week. Noticeable leaf feeding by D. 

 virgifera observed on corn in Winnebago County; and in southern Sauk CounTy as 



