Volume 21 July 9, 1971 Number 28 



COOPERATIVE ECONOMIC INSECT REPORT 



HIGHLIGHTS 



Current Conditions 



CORN LEAF APHID heavy on sorghum in Texas and Kansas. GREENBUG damage isolated 

 in Texas, (pp. 484-485). 



ALFALFA WEEVIL damaged alfalfa in South Dakota, Utah, Michigan, and Vermont, 

 (p. 489). 



REDBACKED CUTWORM damaged mint in Oregon, (p. 491). 



Several DEFOLIATORS damaging in Pennsylvania: SPRUCE BUDWORM damaged hemlock on 

 40-square-mile area; larvae of a TORTRICID MOTH caused severe defoliation 

 throughout one million acres, with extensive tree mortality reported; defoliation 

 by OAK LEAFTIER heavy on oaks; FOREST TENT CATERPILLAR defoliation moderate to 

 heavy on various tree species. CONIFER SAWFLIES troublesome on pine in Florida 

 and Michigan, (pp. 493-494) . 



SCREWWORM reported for first time since 1961 in Arkansas. FACE FLY increased in 

 California, Utah, and Maryland. HORN FLY annoying cattle in several States, 

 (pp. 495-496) . 



GRASS BUGS damaged grasses in Washington, Utah, and Nebraska, (p. 497). 



Detection 



For new county and island records see page 500. 



Special Reports 



Distribution of Sweetclover Weevil. Map. (p. 502) 



Reports in this issue are for week ending July 2 unless otherwise indicated. 



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