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1972年我们在较小的范围内利用赤眼蜂防治玉米螟取得了初步成功的基础上,1973年在批林整风运动推动下,在市、县各级领导支持下,全县19个社镇进行了大面积赤眼蜂防治玉米螟的示范,共用柞蚕茧1,100斤,从5月15日开始育蛾采卵,6月15日以卵繁蜂,到7月下旬共繁蜂两亿多头。于7月16日放蜂防治玉米螟(一年一代),放蜂面积达8,000多亩。据几个公社10个大队的360亩玉米地的调查统计,放蜂后玉米螟卵块寄生率平均为96.1％,卵粒寄生率为87.9％,玉米被害株率减少58.7％,越冬残虫量减少64.1％。取得了明显效果,深受贫下中农欢迎。
Based on the initial success achieved by Trichogramma in the prevention and control of the Ostrinia nubilalis in 1972, the 19 townships and townships in the county were supported by leaders at all levels of the city and county under the impetus of the campaign of rectification of forests in 1973. Conducted a large scale Trichogramma ostriniae prevention and control of corn borer demonstration, sharing tussah cocoons 1,100 pounds, from May 15 start moth eggs, June 15 to egg bumble bees, to the end of July a total of more than 200 million bee bulls . On July 16, the bee-preeing corn borer (one generation) was put and the area of bee-pollinators reached 8,000 mu. According to a survey conducted by 360 commune corn farms of 10 communes in several communes, the parasitism rate of the eggs of the corn borer was 96.1% on average, the parasitism rate of ovum was 87.9%, the rate of damaged corn was reduced by 58.7% and the number of overwintering species was reduced 64.1%. Achieved remarkable results, welcomed by the poor middle peasants.