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长江下游沿江北岸高沙土地区,是花生主要产地,素受蛴螬为害,近几年来随着种植绿肥和施肥水平的提高,土壤有机质增加,为此蛴螬大面积猖獗发生,损失率平均36％以上。1978年田间残留虫量达15,000—28,000头,平均21,000头,1979年未防田块每平方米平均有虫40.17头,危害损失率平均36.50％,最高40.96％。1980年卵孵高峰期,每亩最高有虫卵283,200(粒)头,平均37,000头(粒)。
In the high sandy soil area along the north bank of the Yangtze River, it is the main producing area of peanut and is affected by the slugs. In recent years, with the increase of planting green manure and fertilization level, the soil organic matter increases. As a result, the ravaging area is rampant with the loss rate averagely over 36%. In 1978, the amount of residual insects in the field was 15,000-28,000, an average of 21,000. In 1979, the average number of insects per square meter was 40.17 in the field, with an average of 36.50% and a maximum of 40.96% respectively. The peak of egg hatching in 1980 was 283,200 eggs per acre, with an average of 37,000 heads.