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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



ARMYWORM (Pseudaletia unipuncta ) - NORTH DAKOTA - Larvae averaged 1 per square 

 foot in storm damaged oatfield near Des Lacas in Ward County. About 90 percent 

 of leaves stripped in regrowth oats in late milk stage. (Brandvik) . 



CORN EARWORM (Heliothis zea) - OKLAHOMA - Ranged 3-4 per head of sorghum in Caddo 

 County. Moderate to heavy in late sorghum in Cotton, Tillman, and Okmulgee 

 Counties. (Okla . Coop. Sur.). NEBRASKA - Ranged 0-12 (averaged 4) per 25 ears in 

 8 cornfields in Hamilton, Merrick, Nance, and Howard Counties. (Berogan) . 

 MICHIGAN - Limited adult collections on August 21, 22 at Lenawee blacklight 

 station. Growers can expect larval problems soon, especially when fresh silk 

 exposed. Expect increase until killing frost. Late crops should be watched. 

 (Laughlin) . DELAWARE - Adults 32 per night in blacklight traps in Sussex County, 

 and larvae averaged 2 per ear in untreated sweet corn. (Burbutis, Lesiewicz) . 

 MARYLAND - Moths increasing in light traps on Eastern Shore. Ear infestation 

 ranged 14-26 percent in processing corn in Queen Annas County. (U. Md., Ent . 

 Dept.). VIRGINIA - Subeconomic in most sorghum in Dinwiddle, Sussex, Greenville, 

 Isle of Wight, and Nansemond Counties. Larvae very light in Greenville, Sussex, 

 Southampton, Isle of Wight, and Nansemond Counties peanuts. Larvae subeconomic 

 on soybeans in Nansemond, Sussex, Southampton, Isle of Wight, and Prince George 

 Counties. (Allen). KENTUCKY - Larvae damaged corn in Logan County. Feeding in 

 whorls and ears. Larvae averaged 4.5 per 10 plants. (Barnett) . SOUTH CAROLINA - 

 Building up in most counties, especially those in middle and southern areas. 

 Economic populations on soybeans reached in many areas. Heavy on unprotected 

 sweet corn statewide. (Thomas). TENNESSEE - Surveys in west area soybeans 

 negative; pod development in most fields almost to stage where beans become very 

 attractive to egg laying and to stage where pods will support damaging population. 

 Counts continue heavy in blacklight traps in west areas and increase expected for 

 next generation. (Gordon). ARKANSAS - Gradually increasing in soybeans. Currently 

 moth flights heavy; expect larval increase in soybeans. With good moisture in 

 most areas, cotton will not "cutout" as rapidly. This should keep moths divided 

 between 2 crops. In Lonoke and Prairie Counties, larvae 10 per 30 row feet. In 

 Desha County, heaviest count 62 per 30 row feet. Infestations in only a small 

 percentage of fields. (Boyer) . 



CORN LEAF APHID ( Rhopalosiphum maidis ) - OKLAHOMA - Still heavy on late sorghum 

 in Cotton and Tillman Counties. (Okla. Coop. Sur.). MAINE - Generally light. 

 Adult and larvae of several species of lady beetles present and up to 1 larva 

 per 5 plants. Last week populations of R. maidis very heavy in one field. Same 

 field this period showed sharp decrease in populations with 25 percent of those 

 on plants parasitized and many infested by fungus. (Gall). 



HORNWORMS (Manduca spp.) - TENNESSEE - Larvae 3 per 10 stalks, indicates some 

 damage expected even though larvae small (second or third instar) and harvesting 

 of tobacco noted in Franklin County. (Cagle) . OHIO - M. sexta (tobacco hornworm) 

 in Adams County, averaged 0.15 per tobacco plant. Individual field averages as 

 high as 0.45 per plant. Up to 45 percent of plants sampled showed damage. Ten to 

 25 percent of individual leaves eaten. (Andress) . ARIZONA - M. sexta larvae 

 damaging chili peppers in few fields at McNeal, Cochise County. (Ariz . Coop. 

 Sur.). 



GREENBUG (Schizaphis graminum ) - TEXAS - Light in Trans-Pecos area, less than 50 

 per plant in most fields. Populations in High Plains reduced by beneficial 

 insects. Damaging infestations not reported in Amarillo area, Potter County. 

 (Neeb, Clymer) . ARKANSAS - Specimens collected in Randolph County, August 16. 

 This is a new county record. Moderate, 0-500 per plant in Washington County. 

 (Boyer) . 



POTATO LEAFHOPPER (Empoasca fabae ) - MISSOURI - Light to moderate, 18-120 per 

 10 sweeps of alfalfa in southwest area. (Munson) . MARYLAND - Averaged 50 per 

 sweep in 15 acres of alfalfa in Queen Annes County. (U. Md., Ent. Dept.). 



