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绵阳地区常年栽水稻480万亩,1976年开始推广杂交稻,1983年已种植337.7万亩,加之低温少雨的气候条件,从而使水稻螟虫种群发生了显著的变化,二化螟已由当年的55.63％上升到99.66％;三化螟从33.11％下降为0.13％。在防治上也从前甘多年主治三代三化螟转向普遍防治一、二代二化螟。针对生产上乱用农药,农药销量(80％为有机氯制剂)逾万吨的严重情况,我们自1980—1983年对二化螟防治指标进行了研究。
In Mianyang area, perennial rice is planted at 4.8 million mu. In 1976 hybrid rice was planted and 337.7 million mu was planted in 1983. In addition, climatic conditions such as low temperature and low rainfall caused significant changes in rice stem borer population. The stem borer had changed from 55.63 % Increased to 99.66%; the yellow rice borer decreased from 33.11% to 0.13%. In the prevention and control also Gan former years for more than three generations of stem borer to the general control of the first and second generation of Borer. In view of the serious situation of over 10,000 tons of pesticides and pesticides sold in the production (80% of the organochlorine preparations), we studied the control indexes of Chilo suppressalis from 1980 to 1983.