玉米螟是我县主要农业害虫之一。每年对玉米的为害率均在40%左右,严重的地块高达70～80%。一般减产一成左右,是我县玉米产量低而不稳的重要因素之一。我县是个重点柞蚕产区,每年放养柞蚕近30,000把,仅春蚕就有4,000多把,可甩掉废母蛾160万头,重达7吨之多,可供40～50万亩地放蜂制卡的中间寄主,为我县大搞育蜂治虫提供了有利条件。1975年,在学习无产阶级专政理论运动推动下,在农业学大寨大好形势鼓舞下,在各级党委的统一领导下,我们学习外地经验,依靠广大群众和科技人员的共同努力,利用我县柞 Corn borer is one of the major agricultural pests in our county. The annual damage rate of corn is about 40%, severe land up to 70 to 80%. Generally cut about 10%, is my county corn production is low and unstable one of the important factors. The county is a key tussah producing area. There are nearly 30,000 tussah stocked each year, with over 4,000 spring silkworms alone. They can throw away 1. 6 million waste mother moths and weigh as much as 7 tons for 40 to 500,000 mu The middle of the business card host, for my big cause of beeworms provide favorable conditions. Inspired by the great situation in Daxiu and the unified leadership of Party committees at all levels, in 1975, under the guidance of the theoretical movement of proletarian dictatorship and under the unified leadership of Party committees at all levels, we learned from foreign experiences and rely on the joint efforts of the broad masses of people and scientific and technological personnel to make use of our county oak