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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



ARMYWORM (Pseudaletia unipuncta ) - MICHIGAN - Adults increasing, but normal for 

 time of year. No unusual peaks yet. (Newman). TENNESSEE - Damaged Bermuda grass 

 sod in Dyersburg, Dyer County. (Cultra, Bruer) . 



BEET LEAFHOPPER (Circuliier tenellus ) - CALIFORNIA - Surveys in Ventura County 

 of areas growing sugar beets, beans, peppers, and tomatoes showed that curly top 

 disease infection below 2 percent in tomatoes and peppers. Curly top disease in 

 sugar beets averaged 10 percent. (Cal. Coop. Rpt.). 



CORN EARWORM (Heliothis zea ) - ALABAMA - Damaging counts in one 20-acre field of 

 soybeans in 6 central and western counties. Larvae averaged 3 middle instars per 

 row foot. (Henderson, Morgan). Larvae of this species and Celama sorghiella 

 (sorghum webworm) heavy, ranged 2-6 per head of grain sorghum at Fyffe in De 

 Kalb County. Other nearby varieties with open developing heads show occasional 

 larvae. (Galloway). SOUTH CAROLINA - H. zea still economic on soybeans in many 

 areas where controls not applied. (Thomas, Nettles). KENTUCKY - Larvae damaged 

 corn in Scott County; averaged 1.4 per ear at one location. (Barnett) . VIRGINIA - 

 Damage spotty in southern Tidewater area, some economic damage. (Allen). 

 DELAWARE - Adults 19 per night in blacklight traps in Sussex County. (Burbutis) . 

 MICHIGAN - Sharp increase at all blacklight stations. Watch late-planted sweet 

 corn; will need protection until frost. (Newman). WISCONSIN - Moth catches 

 increased. At Oakfield, Fond du Lac County, counts of 76 and 77 occurred on 

 September 7 and 8. Counts of 20 and 43 occurred at Arlington, Columbia County, 

 on September 5 and 6. Counts of 400 and 233 occurred at Waldo, Sheboygan County, 

 on September 5 and 6. Treatment of sweet corn underway in several areas. (Wis. 

 Ins . Sur .) . 



CORN LEAF APHID (Rhopalosiphum maidis ) - ARIZONA - Heavy on ensilage sorghum at 

 Safford, Graham County. (Ariz. Coop. Sur.). MAINE - Heavy and damaged several 

 cornfields in central areas. (Gall). 



GREENBUG (Schizaphis graminum ) - ARIZONA -Appeared about mid-August on sorghum 

 in Yuma Valley and currently dominant aphid in Yuma County. (Ariz. Coop. Sur.). 

 TEXAS - Light in Trans-Pecos area; less than 50 per plant in most fields. 

 (Neeb) . 



SPOTTED ALFALFA APHID ( Therioaphis maculata ) - NEW MEXICO - Light on alfalfa in 

 Farmington area, San Juan County. (Heninger) . NEBRASKA - Ranged 31-187 per 100 

 sweeps in 5 Dawson County fields. (Manglitz) . 



CORN, SORGHUM, SUGARCANE 



EUROPEAN CORN BORER (Ostrinia nubilalis ) - KANSAS - Larvae light (third and 

 fourth instars) in corn in Hodgeman, Finney, and Haskell Counties. Hodgeman and 

 Haskell are new county records. Determinations by H.L. Brooks and K.O. Bell. 

 (Bell). SOUTH DAKOTA - Damaged irrigated corn west of Spearfish, Lawrence County. 

 Infested 1-2 percent of stalks. Third and fourth instar larvae present. This is 

 a new county record. (Jones, Rezek) » IOWA - Collected 107 moths in light trap 

 night of September 9 at Ankeny, Polk County. Indicates start of third brood. 

 Moths that emerge now will decrease spring population. (Iowa Ins. Sur.). 

 WISCONSIN - As many as 3 egg masses per 25 plants noted near Spring Green, Sauk 

 County. Field observations show 30 percent of larvae in fifth instar, 10 percent 

 fourth, 30 percent third, 20 percent second, and 10 percent first. Infestation 

 of late sweet corn ranged 16-76 per 100 plants in southwestern counties. Most 

 larvae entered ears through husks, but few still in silks. Moth flight declined. 

 (Wis. Ins. Sur.). DELAWARE - Adults 53 per night in blacklight traps at Bridge- 

 ville, Sussex County. (Burbutis). SOUTH CAROLINA - Problem on grain sorghum, 10 

 percent infestations noted in several areas of Coastal Plain. (Thomas). 



