. Cooperative economic insect report. Beneficial insects; Insect pests. - 582 - weather, axid peak egg-laying should occui* about June 9. This is much earlier than usual. (Iowa. Ins. Inf., May 25). MINNESOTA - Pupation 90 percent in Anoka County. (Minn. Ins. Rpt.) . SOUTH DAKOTA - First pupa of season foimd May 29 in Union County. (Hintz). MARYLAND - First instars beginning to cause noticeable injury to whorls and leaves of early planted sweet and field corn in Dorchester, Wicomico and St. Marys Counties. (U. Md,, Ent. Dept.). DELAWARE - First adult flight continues at a rather high level; 60
. Cooperative economic insect report. Beneficial insects; Insect pests. - 582 - weather, axid peak egg-laying should occui* about June 9. This is much earlier than usual. (Iowa. Ins. Inf., May 25). MINNESOTA - Pupation 90 percent in Anoka County. (Minn. Ins. Rpt.) . SOUTH DAKOTA - First pupa of season foimd May 29 in Union County. (Hintz). MARYLAND - First instars beginning to cause noticeable injury to whorls and leaves of early planted sweet and field corn in Dorchester, Wicomico and St. Marys Counties. (U. Md,, Ent. Dept.). DELAWARE - First adult flight continues at a rather high level; 60 specimens taken in blacklight trap in Sussex County May 23-31. (Burbutis). NEW JERSEY - Moths observed in Burlington and Middlesex Counties. ( Newsltr., May 29). NEW YORK - Pupation 60 percent in Hudson Valley on May 22; no adults emerged. (N. Y. Wkly. Rpt., May 28) . SOUTHWESTERN CORN BORER (Zeadiatraea grandiosella) - ARKANSAS - Egg deposition underway in northwest; first instar found in cornfield in Benton County, north- west area (corn 2-3 feet high and tallest in area). (Ark. Ins. Sur.). MISSISSIPPI - Survey of 18 old corn'fields in 16 counties revealed a population of 683 live larvae per acre, Suxvival of overwintering larvae 48 percent. Map below shows 38 infested counties in the State as of April 1962. (Henderson).. Counties Infested by Southwestern Corn Borer in Mississippi April 1962 ARMYWORM (Pseudaletia unipuncta) - MISSOURI - Most larvae throughout State full grown; only small larvae observed in grasses and pastures. (Munson, Thomas, Wood) ILLINOIS - Larvae varied 0-2 per linear foot in standing wheat in west, central and east districts, and 3-5 per square foot in lodged wheat in east and east- southeast districts. Larvae of all sizes present. Few larvae killed by disease observed in east and east-southeast districts. (111. InSo Rpt.). INDIANA - Localized infestation caused severe damage to 2 urban homesites and a grainfield. Please note that these im
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