. Cooperative economic insect report. Beneficial insects; Insect pests. 97 -. Distribution of Western Corn Rootworm Adult populations of CORN FLEA BEETLE (Chaetocnema pulicaria) varied 2-6 per plant in early corn in southern ILLINOIS by May 15 and were as high as 12 per plant in the East St. Louis area, with some fields being treated the week of May 22. Populations averaged 42 adults per 100 plants in field corn in the west-southwest section of the State by June 12. Small, localized numbers of corn flea beetle were observed in a few fields of corn in counties in central and southeastern NEBRAS
. Cooperative economic insect report. Beneficial insects; Insect pests. 97 -. Distribution of Western Corn Rootworm Adult populations of CORN FLEA BEETLE (Chaetocnema pulicaria) varied 2-6 per plant in early corn in southern ILLINOIS by May 15 and were as high as 12 per plant in the East St. Louis area, with some fields being treated the week of May 22. Populations averaged 42 adults per 100 plants in field corn in the west-southwest section of the State by June 12. Small, localized numbers of corn flea beetle were observed in a few fields of corn in counties in central and southeastern NEBRASKA during June, and the pest was generally not of economic importance in KANSAS during 1960. Corn flea beetle infestations in OKLAHOMA were noneconomic to generally light (0-2 per plant) in corn and grain sorghum from late May through September in the eastern half of the State. Medium to locally heavy populations were limited to isolated fields in south central and east central areas and there was little change noted from the overall corn flea beetle populations recorded during 1959. Corn flea beetle was mostly light on corn and grain sorghum in north central TEXAS during 1960. In UTAH, corn flea beetle again damaged sweet and field corn throughout the season in Washington County and less commonly elsewhere in the State. Corn flea beetle numbers on sweet and field corn in MARYLAND were slightly above normal and adults were first noted on young corn in Sussex County, DELAWARE, in late April, becoming fairly abundant by mid-May. Feeding injury was heavy when corn was young, but generally was light during most of the season in Delaware. DESERT CORN FLEA BEETLE (Chaetocnema ectypa) infestations in ARIZONA were light to medium on central and southwest area corn and sorghum during April, May and June, with damage light in most cases. Larvae of CHRYSOMELIDS (Maecolaspis spp.) damaged 50 percent of corn plants in an Edgar County, ILLINOIS, field in early June, with an average of 10 per
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