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我县三甲区甲北公社光辉大队有桔园120亩,1974年幼桔丰收,总产10万斤以上,1975年由于遭受卷叶蛾(拟小黄和后黄卷叶蛾)为害,减产五成半。去冬今春以来,连续采用人工、药剂、生物等方法进行综合防治。今年5月7日即第一代卷叶蛾幼虫出现时.每亩桔园撒施白僵菌一斤,共防治100亩(其中2亩用喷雾法放菌)5月17—18日检查,发现3—5条幼虫青色带黄后干瘪倒桂
Our county Jiabei District Jiabei Brigade brigade has 120 acres of orange orchard, juvenile bumper harvest in 1974, with a total output of more than 10 kg, in 1975 due to suffering from leaf roller moth (Quccinuous and after yellow leaf roller) damage, cut production by 50%. Since winter and spring, continuous use of artificial, pharmaceutical, biological and other methods for comprehensive prevention and treatment. May 7 this year, the first generation of larvae appear when the larvae of verbena per acre administered Beauveria bass, a total of 100 acres (of which 2 acres by spray law) May 17-18 inspection and found that 3 -5 larvae yellowish yellow dry shriveled down