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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



BEET LEAFHOPPER (Circulifer tenellus ) - CALIFORNIA - Estimated 200,000 acres to 

 be treated in October in San Joaquin Valley from Kern to Merced County. Nymphs 

 increased in most areas. (Cal. Coop. Rpt.). 



CORN EARWORM (Heliothis zea ) - DELAWARE - Adults averaged 16 per night in black- 

 light traps and infestations in untreated sweet pepper averaged less than 1 per- 

 cent in Sussex County. (Burbutis, Lesiewicz) . VIRGINIA - Heavy in milo through- 

 out Isle of Wight County. (Goerger) . Damage 10-20 percent in soybeans east of 

 City of Richmond. Damage confined to beans planted after July 1. Most larvae 

 late instars and controls difficult. (Allen). NORTH CAROLINA - Critical period 

 ended for all but very late soybeans in southern and central portion of State. 

 Late fields in northern counties and especially counties northeast of Martin 

 County should be watched for fresh pod damage. (Hunt) . TENNESSEE - Infested and 

 damaged 99 percent of ears of late corn surveyed in Franklin County. (Cagle) . 

 UTAH - Injury light to sweet corn in northern and central areas. (Knowlton, 

 Duncan) . 



GREENBUG (Schizaphis graminum ) - WASHINGTON - General and scattered, averaged 

 less than 5 per linear foot on fall wheat in Benton, Yakima, and Franklin 

 Counties. Infestations light to moderate on about 200 acres of sorghum in several 

 locations north of Pasco in Franklin County. (Klostermeyer) . TEXAS - Light on 

 wheat in panhandle area. Generally less than 1 per row foot in Deaf Smith, 

 Swisher, and Castro Counties. Numerous beneficial insects noted in these counties, 

 Greenbugs in wheat in Briscoe and Armstrong Counties. Large numbers of beneficial 

 insects observed. (Daniels). 



SPOTTED ALFALFA APHID (Therioaphis maculata) - KANSAS - Averages per 10 sweeps 

 of alfalfa (2 fields) by county: Chautauqua 3-10, Cowley 0, Butler 2-35. 

 (Bell). OKLAHOMA - Ranged 0-20 per 10 sweeps of alfalfa in Payne County. (Okla. 

 Coop. Sur.). NEW MEXICO - Light to moderate in Rio Arriba County alfalfa fields. 

 (Heninger) . 



CORN, SORGHUM, SUGARCANE 



EUROPEAN CORN BORER (Ostrinia nubilalis ) - NORTH CAROLINA - Damaged 45 percent 

 of stalks checked in counties south of Harnett. Larvae 100-150 per 100 stalks. 

 (Sorensen, et al.). VIRGINIA - Severe infestations in milo in Isle of Wight 

 County. (Goerger, Allen). DELAWARE - Adults 2 per night in Sussex County. 

 (Burbutis, Lesiewicz). SOUTH DAKOTA - Larvae taken from corn in isolated field 

 east of Glad Valley, northwestern Ziebach County. Infestation about 20 percent, 

 fourth instar larvae 2-3 per infested stalk. This is a new county record. Now 

 recorded from every county in State. (Jones). NEBRASKA - Ten fields surveyed in 

 eastern Red Willow County averaged 75 percent infested with average of 2 borers 

 per stalk. In western Red Willow County, borers infested 50 percent of plants 

 and averaged 1 per stalk. (Campbell, Klein). KANSAS - Infested about 1 percent 

 of stalks in Grant County field. This is a new county record. (Bell) . 



WESTERN BEAN CUTWORM (Loxagrotis albicosta ) - NEBRASKA - Infestations very light 

 in eastern half of Red Willow County, but approached 50 percent of ears infested 

 in west. Few last instar larvae remained in corn ears, but most left to enter 

 soil. (Campbell, Klein). 



SORGHUM WEBWORM (Celama sorghiella ) - ALABAMA - Larvae heavy in grain sorghum in 

 southern areas. Larvae 100 per head in one field in Pike County. (Pike et al.). 

 MISSISSIPPI - Damage light to moderate in several fields of sorghum in Noxubee, 

 Lowndes, and Clay Counties. (Robinson). 



WESTERN CORN ROOTWORM (Diabrotica virgifera ) - WYOMING - Adults in corn near 

 Powell, Park County, August 16, and Laramie, Albany County, September 13. 

 Collected and determined by C.C. Burkhardt . These are new county records. 

 (Burkhardt). SOUTH DAKOTA - Adults light, less than 1 per 200 stalks, in fields 



