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新郑县为河南省主要产枣区之一,其中以孟庄人民公社分布最多,且栽培集中,密植成林,约7万余亩,64万多株,年产大枣400余万斤。枣尺蠖是大枣生产中的主要敌害,发生严重时,常把嫩芽幼叶吃光,使大枣不能座蕾开花、结实,对枣树的生长发育和产量影响很大,估计每年减产78.7峯以上。孟庄人民公社自1961年起,开始用飞机大面积防治枣尺蠖,连续4年取得了显著的效果,据1964年的普遍调查,虫口密度较未防治地区平均降低了95峯以上,基本上制止了枣尺蠖的危害,从而大大地解放了群众的劳动生
Xinzheng County is one of the major producing areas in Henan Province, of which the most widely distributed Mengzhuang People’s Commune, and intensive cultivation, planting dense forests, about 7 acres, more than 640,000 strains, with an annual output of more than 400 kg jujube. Zizyphus jujube Jujube is the production of the main enemy, in serious cases, the young leaves are often eaten shoots, jujube can not seat bud blossom, strong, Jujube growth and yield of a great impact, it is estimated that annual reduction Above 78.7 peaks. Since 1961, Mengzhuang People’s Commune started to control the jujube tree with large area on a large scale and achieved remarkable results for 4 consecutive years. According to the general survey in 1964, the population density of insects decreased by more than 95 peaks on average over the non-control areas and basically stopped The dangers of jujube scales, which greatly liberated the working people of the masses