蠋蝽人工繁殖技术及田间释放控制研究

Study on artificial breeding technology and releasing in field of Arma chinensis Fallou

研究蠋蝽人工繁殖饲养条件、田间释放等结果表明:以榆树为栖息植物其存活率为82.0%,大豆苗为61.3%,杨树为34.6%;以榆树为栖息植物的其产卵量为330.8粒,大豆苗为255.7粒,杨树为225.3粒。利用蠋蝽4～5龄若蝽对甜菜夜蛾(Laphygma exigua)的捕食量测定研究显示,可捕食甜菜夜蛾1～2龄幼虫约2头/d,5龄幼虫0.3头/d。田间释放试验结果表明:蠋蝽与甜菜夜蛾幼虫以1∶15的比例释放,放蝽后20d的防治效果达83.3%。

The research emphases on artificial breeding and releasing in field techniques of Arma chinensis.The results indicated that survival rate from the elms tree,poplar seedling and soybean seedling as a habitat for A.chinensis was 82.0%,61.3%,34.6%,and the ovipositing eggs on the elms tree,poplar seedling and soybean seedling were about 330.8,255.7 and 225.3.The field experiments of releasing A.chinensis were undertaken to control Laphygma exigua,and the 4-5 instar nymph of A.chinensis preyed 2 heads of 1-2 instar larvae or 0.3 heads of 5 instar larvae of L.exigua.The ratio of releasing A.chinensis to L.exigua Larvae was 1∶15,and control effect was about 83.3% after releasing 20 days.