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1975年玉米、高粱钻心虫越冬基数很大,比一般年份高1—1.5倍,个别高达2倍以上,成活率平均在80—90%以上,造成1976年第一代来势猛,数量特大,发生普遍。玉米、高粱钻心虫除为害春玉米制种田外,在麦收后,便大量集中到棉麦间作的棉花上进行为害。6月中旬初发现被害株,6月中旬末进入为害盛期,间作棉田棉株受害率达5—10%,较重的15—20%,个别严重的地块竟达70%。对此,我们同三角村等大队和生产队的技术员进行了
1975 corn, Sorghum borer a large base of winter, 1-1.5 times higher than the average year, up to 2 times more individual, the average survival rate of more than 80-90%, resulting in the first generation in 1976 fierce Meng, the number of extra large occurred universal. Corn, sorghum borer insects in addition to damage the spring maize farming, after the wheat harvest, it will be a large number of cotton and wheat intercropping for cotton. In early June, the victim was found. At the end of June, it entered the peak of damage. The damage rate of inter-crop cotton plant reached 5-10% and heavier 15-20%, while that of some serious land was as high as 70%. In this regard, we carried out with teams such as Triangle Village and production team technicians