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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



ARMYWORM ( Pseudaletia unipuncta ) - KANSAS - Moth flights still heavy at Manhattan, 

 Riley County. (Bell) , SOUTH DAKOTA - Late instars present under windrowed alfalfa 

 in western Dewey County. Averaged one larva per square foot in some fields. 

 (Jones) . MINNESOTA - Occasional larva found in reed canary grass or alfalfa in 

 southwest and central districts. Blacklight trap collections light for past 14 

 days. (Minn. Pest Rpt.). WISCONSIN - Late instars appeared in some fields of 

 early peas and controls applied. Early instars appearing in alfalfa and peas. 

 Earlier moth flight apparently undetected. (Wis. Ins. Sur.) . MICHIGAN - Larvae 

 reported in field of corn near Bellevue, Eaton County. (Cook). Growers should 

 check corn and small grains for this pest. (Ruppel) . Moth counts decreasing at 

 all blacklight stations, indicating end of emergence. Larval populations near 

 peak, problems in small grains should be evident. (Sauer) . OHIO - Numbers of 

 first-generation moths decreasing rapidly in blacklight traps. (Rings). Larvae 

 damaging corn in Wayne and Columbiana Counties. (Blair, Rings). MARYLAND - Damage 

 levels in corn and small grain dropped below economic thresholds statewide. Spring 

 infestations heaviest with past 4 years. (U. Md., Ent . Dept.). 



ARMY CUTWORM ( Euxoa auxiliaris ) - COLORADO - Larvae 0-7 per corn plant in fields 

 southeast of La Sal 1*6^ Weld County. Chemical control and reseeding necessary. 

 (Rothman) . UTAH - Light on rangeland in Cache County. (Knowlton) . NORTH DAKOTA - 

 Larvae destroyed 15 acres of 30-acre field of sugar beets in Pembina County. 

 (Lundquist, Frye) . MINNESOTA - Damaged flax field near Lake Park, Becker County. 

 (Minn. Pest Rpt.) . 



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

 decreasing, migrating into vegetable crops. Counts ranged 200-300 per 100 sweeps 

 of oats although occasional fields with 500 per 100 sweeps. (Wis. Ins. Sur.). 

 MICHIGAN - Averaged 2-3 per lettuce plant in some Ingham County fields. Some 

 aster-yellows infected plants apparent. (Bath, Cress). 



BEET LEAFHOPPER (Circulifer tenellus ) - COLORADO - Counts 0-3 per 10 square feet 

 in Montrose and Delta Counties. Most sugar beets entering 8 to 10-leaf stage. 

 (Bulla) . 



CORN EARWORM ( Heliothis zea) - TEXAS - Damaging grain sorghum in large areas of 

 central and north-central areas. (Turney, Green). OKLAHOMA - Infested 100 percent 

 of corn ears in Tipton area, Tillman County. Moderate in corn in Marshall County, 

 light in tassels of corn in Mayes County. Averaged 1 per 25 terminals in peanuts 

 in Garvin County. (Okla. Coop. Sur.). KANSAS - Larvae reported infesting 50 

 percent of whorls of sweet corn in Sedgwick County week ending June 18. Currently 

 in same field, larvae averaged 2 per plant in silks or whorls and eggs averaged 

 3 per ear on silks. (Bell). ILLINOIS - Feeding in corn whorls about to tassel in 

 western part of State. (Sur. Bull.). TENNESSEE - Immatures feeding in whorls of 

 corn in some fields in central and west areas. Below control levels. (Gordon). 

 ALABAMA - Scattered infestations on 5-20 percent of 5-foot-high corn in Chilton 

 County. Damage reported in many fields in Cullman County. Larvae light but wide- 

 spread in ears of corn in Baldwin County. (Futral et al.). 



CORN LEAF APHID (Rhopalosiphum maidis ) - TEXAS - Infestations increased in older 

 grain sorghum throughout panhandle area. Economic damage not anticipated in any 

 fields observed. Light in grain sorghum in Brazos, Robertson, and Burleson 

 Counties. Light to moderate in Pecos, Reeves, and El Paso Counties. (Green et al.). 

 KANSAS - Mostly none, but occasionally very light populations, noted in sorghum in 

 west-central and northwest districts. None to very light in sorghum in Geary and 

 Shawnee Counties, but one field of 14-inch-high sorghum in Shawnee County had 

 600+ per plant; lady beetles, lacewing larvae, and other predators very abundant 

 in this field. (Bell). MISSOURI - Light to moderate feeding in whorls of grain 

 sorghum throughout southern areas. (Munson) . NEBRASKA - Light in grain sorghum; 

 ranged 1-15 nymphs per plant on 3-4 percent of plants examined in Gage, Lancaster, 

 Jefferson, Thayer, Nuckolls, Webster, Franklin, Harlan, Furnas, and Red Willow 

 Counties. (Staples, Cornelius) „ 



