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GREENBUG ( Schizaphis graminum) - SOUTH DAKOTA - General and heavy on sorghum in 

 most areas. Parasites and predators below effective levels due to cool weather. 

 S. graminum approaching economic levels in most green sorghum examined near Presho, 

 Lyman County. Drought retarded growth of sorghum in some fields. (Jones). IOWA - 

 Specimens on grain sorghum in Osceola County August 4. This is a new county 

 record. (Iowa Ins. Sur . ) . NEBRASKA - Declined on grain sorghum in east and south- 

 east due to parasites and predators. Heavy on grain sorghum near Trenton in 

 Hitchcock County and on forage sorghum in Knox County. (Campbell, Thomas). Live 

 aphids ranged 0-10 per leaf and mummies up to 300 per leaf in 3 Otoe County 

 fields. Live greenbugs averaged about 75 per leaf and mummies about 100 per leaf 

 in Dodge County field. (Berogan) . KANSAS - Economic in sorghum in southwest 

 district. For first time this season, parasitic wasps important in greenbug 

 control in Scott, Ness, and Lane Counties (up to 70 percent of greenbugs 

 parasitized) ; fields in which greenbugs showed considerable parasitism extended 

 south into Hamilton, Finney, and Hodgeman Counties. Surveys showed^, graminum 

 populations continuing to decrease on sorghum in east-central and northeast 

 districts primarily due to parasitic wasps. Parasitism heavy in one sorghum field 

 in Butler County (first report from this area) . Heavy parasitism also in Osborne 

 County. (Bell). 



OKLAHOMA - S. graminum increasing on sorghum in many southwest and west-central 

 counties. Ranged up to 250 per leaf. Also on volunteer wheat in some areas. 

 Decreasing (rapidly in some fields) in Texas County due to parasitism and plant 

 maturity. Ranged 75-600 per plant with 2-10 percent parasitized in many fields, 

 up to 60 percent parasitized in one field. Ranged 0-250 per plant in one field 

 of nearly mature sorghum in Muskogee County. Light in Payne County. (Okla. Coop. 

 Sur.). TEXAS - Populations in South Plains apparently peaked; decreasing due to 

 activity of beneficial insects. Greenbug light to moderate on grain sorghum in 

 El Paso and Hudspeth Counties. Light in Pecos Valley area. (Rummel, Neeb) . 

 COLORADO - Ranged 0-500 per leaf on lower leaves in most sorghum in Arkansas 

 Valley. Heaviest in Prowers County, late-planted fields severely damaged. 

 Controls underway. (Schweissing) . 



HORNWORMS (Manduca spp.) - MARYLAND - Third and fourth instars on Type 32 tobacco 

 ranged 1-3 per 50 plants in Charles, St. Marys, Calvert, and Prince Georges 

 Counties. (U. Md . , Ent . Dept.). TENNESSEE - M. sexta (tobacco hornworm) damage 

 observed on tobacco in upper eastern area. Daily rains hindered control efforts. 

 (Gordon) . 



POTATO LEAFHOPPER ( Empoasca fabae ) - NEW YORK - Present but below economic levels. 

 If weather becomes hot and dry after second cutting of alfalfa, fields should 

 be watched. (N.Y. Wkly . Rpt , , Aug. 2). MARYLAND - Continues moderate to heavy 

 in 20 percent of alfalfa acreage in Frederick, Carroll, and Baltimore Counties. 

 Heaviest counts in central area ranged 50-250 per sweep. Heaviest counts in 

 Eastern Shore alfalfa ranged 50-75 per sweep. Yellowing of foliage found in 

 several areas throughout State. (U. Md., Ent. Dept.). WISCONSIN - Populations 

 building up on potato, bean, and pepper plants, particularly in home gardens. 

 Not much change in population on alfalfa. Ranged 1-30 per sweep and scattered 

 fields show evidence of yellowing. (Wis. Ins. Sur.). 



SPOTTED ALFALFA APHID ( Therioaphis maculata) - NEW MEXICO - Scattered infestations 

 noted in alfalfa near Los Lunas, Valencia County. Adults and nymphs averaged 5-10 

 per 25 sweeps. (Heninger) . 



TOBACCO BUDWORM ( Heliothis virescens) - TENNESSEE - Light on tobacco in Cocke 

 County. Some damage expected"! (Williams) . KENTUCKY - Larvae averaged 10 per 100 

 tobacco plants at one location in Breathitt County. (Barnett) . 



