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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



ARMYWORM ( Pseudaletia unipuncta ) - SOUTH DAKOTA - Larvae and pupae noted in 

 lodged wheatgrass and alfalfa in northern Sanborn County. Possible buildup in 

 small grain in eastern areas middle to late July. Blacklight trap collections 

 June 28 to July 2 totaled 1,246 moths at Brookings, Brookings County. (Jones). 

 MICHIGAN - Damage spotty in cornfields in Kent County. Only 1 field sprayed. 

 Others beyond point of spraying. (Knisely) . NEW YORK - Larvae ranged 5-10 per 

 square yard in spots in orchard grass in Chautauqua County. Infestations reported 

 in no-till corn. (N.Y. Wkly. Rpt . , July 12). 



ASTER LEAFHOPPER ( Macrosteles fascifrons ) - WISCONSIN - Populations heavy in 

 Oconto County area but controls effective. Expect problems caused by rains and 

 winds and heavy populations; average of 2 per sweep in carrots and 1 per head of 

 lettuce. (Wis. Ins. Sur.). 



BEET LEAFHOPPER ( Circulifer tenellus ) - IDAHO - Planned controls cancelled due 

 to cold, wet weather through first week of June. Host plants remained lush and 

 leafhopper migration to cropland light. (Evans). UTAH - Leaf hoppers and curly-top 

 disease in tomatoes very light to date (Duncan, Knowlton) ; curly-top disease 5 

 percent in Washington County tomatoes (Huber) . 



CORN EARWORM (Heliothis zea ) - NORTH CAROLINA - Expected increase occurring in 

 Piedmont and upper Coastal Plain. Counts in 6 cornfields in Johnston County 

 increased from 36 larvae per 50 row feet per field previous week to 158 for 

 current period. Counts remain low (10 larvae per 300 row feet) in Bertie County; 

 however, increase will occur. (Bradley). MARYLAND - Moths ranged 1-4 at black- 

 light traps near Snow Hill, Worcester County, at Hurlock, Dorchester County, and 

 at Centreville, Queen Annes County. Ear damage remains light, expected to increase, 

 (U. Md., Ent. Dept.). DELAWARE - Second-generation moths light in blacklight 

 traps in Sussex County. (Burbutis) . INDIANA - Middle instars occasionally 

 observed in corn whorls over much of State. (Huber). OKLAHOMA - Moderate on 

 sorghum in Murray County. Occasional larva seen in corn in panhandle counties. 

 (Okla. Coop. Sur.) . 



CORN LEAF APHID ( Rhopalosiphum maidis ) - OKLAHOMA - Heavy in scattered grain 

 sorghum in Craig and Ottawa Counties. Moderate to heavy in most grain sorghum 

 checked in Beaver, Texas, and Cimarron Counties. Ranged up to 250-400 per plant 

 in many fields; ranged up to 700 per plant in Cimarron County field. Light in 

 corn in panhandle counties, usually on emerging tassels. Ranged 0-100 per plant 

 on grain sorghum in Harmon County. (Okla. Coop. Sur.). KANSAS - Mostly light to 

 moderate in sorghum in northeast and east-central districts. (Bell). NEBRASKA - 

 Counts of 150-500+ per whorl, with most plants infested in Furnas County sorghum 

 field. (Keith, Fisher). NORTH DAKOTA - Colonies averaged 200 per plant on sorghum 

 in Dickey County field. (Brandvik) . INDIANA - Percent infestation by district 

 averaged 10.2 (range 0-44) in 9 southwest fields, 16 (range 0-28) in 7 south- 

 central fields, and 10.5 (range 0-24) in 8 southeast district fields. Aphid 

 counts per plant generally small although occasional plants had counts in 

 thousands. Heavy infestations in sorghum reported from various areas of State. 

 (Meyer) . KENTUCKY - Adults and nymphs heavy in 45 percent of corn examined in 

 Hickman County; light in Anderson County. Adults and nymphs infested 70 percent 

 of sorghum plants examined in Hickman County. (Barnett) . 



GREENBUG ( Schizaphis graminum) - SOUTH DAKOTA - Building up on grain sorghum in 

 Aurora, Beadle, Bon Homme, Charles Mix, Clay, Davison, Douglas, Gregory, 

 Hutchinson, Moody, and Spink Counties. Heaviest in more southern counties. Some 

 treatments applied in Charles Mix County. In general, populations still below 

 economic numbers. (Kantack) . NEBRASKA - Infested about 75 percent of sorghum 

 plants in one Furnas County field. Colonies of 5-115 aphids ranged 0-3 per plant. 

 Little visible damage. (Keith, Fisher). Colonies of 10-15 aphids ranged 1-3 per 

 sorghum plant at Mead, Saunders County. Little evidence of parasitism. (Munson) . 

 MISSOURI - Infestations on sorghum throughout northwest area. Ranged 200-3,000+ 

 per plant on sorghum in late boot stage. On early planted sorghum greenbugs 



