. Cooperative economic insect report. Beneficial insects; Insect pests. - 486 - EUROPEAN CORN BORER (Ostrinia nubllalis) - NEW JERSEY - Spring survival survey completed; 97 fields in 12 counties inspected. Mortality of larvae during winter of 1961-62 highest of any year that survey has been conducted. Average percent mortality of overwintering larvae by years as follows: 1954 - ; 1955 - ; 1956 - ; 1957 - ; 1958 - ; 1959 - ; 1960 - ; 1961 - ; 1962 - As in most past years, bird feeding was major factor in killing of larvae during winter months. (
. Cooperative economic insect report. Beneficial insects; Insect pests. - 486 - EUROPEAN CORN BORER (Ostrinia nubllalis) - NEW JERSEY - Spring survival survey completed; 97 fields in 12 counties inspected. Mortality of larvae during winter of 1961-62 highest of any year that survey has been conducted. Average percent mortality of overwintering larvae by years as follows: 1954 - ; 1955 - ; 1956 - ; 1957 - ; 1958 - ; 1959 - ; 1960 - ; 1961 - ; 1962 - As in most past years, bird feeding was major factor in killing of larvae during winter months. ( Newsltr., May 8). DELAWARE - First adults of season emerged May 9 and 10 from cages in Newark. (Bray). MARYLAND - Emergence of moths underway on Eastern Shore; 30 percent complete at Mardella, Wicomico County, on May 8, (U. Md., Ent. Dept.). ILLINOIS - Pupation 4 percent at Urbana. (111. Ins. Rpt.). MINNESOTA - No development of overwintering larvae noted in south central district. (Minn. Ins. Rpt.). IOWA - Annual spring sur- vival survey conducted at random in 45 oat fields in 5 sections of State, plus 32 oat fields in Boone County. Percent survival 82 in southwest, 82 in north- west, 76 in central, 88 in northeast and 89 in southeast. Total of 106 live borers found from grand total of 126. Percent survival for State Average nxxmtaer of live borers per square yard compared with in 1961. Niimber of borers per acre of oat ground 2,275 compared with 2,033 in 1961. First pupae found in Boone County May 12. (Iowa Ins. Inf.). Armyworm Infestations Reported Week Ending May 11 UTK'. ARMYWORM (Pseudaletia unipuncta) - ARKANSAS - Infestations quite common in small grain fields in southeast and eastern areas; 85-90 percent of fields infested with varying numbers of larvae. Larval counts average 1-15 per square foot in infested fields. Second to fourth instars predominant. Infestations in majority of fields economic. About one-third of fields treated to May 12. (Ark. In
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