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蟋蟀是秋田作物的主要害虫,过去由于发生量小,为害轻,所以,不为人们所重视。但近几年来,由于气候条件的改变,特别是降雨量和降雨时间的变化,有利于秋田蟋蟀的活动,发生量明显回升,1985年发生量更是惊人:豆田平均每平方米有虫15头,高达33头,50%以上的叶片被害,光杆株0.6%;绿豆田平均每平方米有虫13头,高达26头,平均叶片被害率3O%;无毒棉田平均每平方米有虫12头,高达31头,平均被害株率68%,被害叶率9%,百株被害铃
Crickets are the main pests of Akita crops. In the past, the occurrence of crickets was less and less harmful, so people did not pay much attention to them. However, in recent years, due to changes in climatic conditions, especially rainfall and rainfall changes in time, is conducive to the activities of Akita crickets, the amount of a significant rebound in 1985 is even more alarming: the average number of pests per square meter 15 , Up to 33, more than 50% of the leaves were killed, light rod strain 0.6%; mung bean average per square meter there are 13 worms, up to 26, the average leaf damage rate of 30%; non-toxic cotton fields average 12 per square meter insect , Up to 31, the average victim strain rate of 68%, the victim leaf rate of 9%, one hundred killed bell