. Cooperative economic insect report. Beneficial insects; Insect pests. 139 Distribution of Cereal Leaf Beetle in the United States as of December 31, 1964. Monroe Counties. A State-Federal suppression program similar to that con- ducted in 1963 was carried out in areas of heaviest infestation in the State. An organic phosphate insecticide used in low dosages without a diluent proved highly effective against adults and larvae. Excellent results were obtained with aerial applications of this material against spring adults, larvae and summer adults in Michigan. The range of cereal leaf beetle co
. Cooperative economic insect report. Beneficial insects; Insect pests. 139 Distribution of Cereal Leaf Beetle in the United States as of December 31, 1964. Monroe Counties. A State-Federal suppression program similar to that con- ducted in 1963 was carried out in areas of heaviest infestation in the State. An organic phosphate insecticide used in low dosages without a diluent proved highly effective against adults and larvae. Excellent results were obtained with aerial applications of this material against spring adults, larvae and summer adults in Michigan. The range of cereal leaf beetle continued to be extended in INDIANA, where infestations were found for the first time during the 1964 season in Boone, Jay, Tipton, Randolph, Madison, Newton and Wells Counties. High populations, however, were confined to oats in La Porte and St. Joseph Counties. In this area, peak oviposition on oats occurred about May 28, with egg counts as high as 300-350 per 100 stems. An 80-percent hatch had occurred by June 5, with maximum populations reach- ing approximately 100-150 larvae per square foot. Pupation was considered 70 percent complete by June 12 and first emergence of summer adults in Indiana probably occurred about June 10. Emerging summer adults reached peak numbers in the State on July 1, with a subsequent rapid decline. By July 24, summer adults were nearly 100 percent in aestivation. Outlined counties Infested. Although repeated surveys for cereal leaf beetle were conducted in ILLINOIS during the 1964 season, the species was not found in that State, and surveys in 13 southeastern and eastern counties of WISCONSIN were also negative. RICE WATER WEEVIL (Lissorhoptrus oryzophilus) populations in rice were at about the same level as during the past 3 seasons in LOUISIANA. Small numbers of Lissorhoptrus simplex were found mixed with the populations of rice water weevil in one area near Crowley, Acadia Parish. In ARKANSAS, larvae of a BILLBUG (Sphenophorus sp.) in stems of ri
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