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近年来,使用呋喃丹拌种防治棉蚜,由于效果好,药效期长并有刺激作物生长的作用,深受群众欢迎。但是,由于单一、连续(指在生长期不科学地连续喷雾)、高剂量使用,导致防治效果逐年下降。为此,我们在1986、1987两年以本地棉蚜对96％呋喃丹进行了抗性测定。一、方法: 1.配制呋喃丹系列浓度:根据预备试验结果,配制5—6个系列浓度,使棉蚜死亡率在10—95％的范围内。 2.采样:于6月上旬在棉蚜盛发期,从未喷药防治的棉田采集有棉蚜的棉叶带回室内,用毛笔挑选体形大小一致的无翅成蚜放在白纸上待测。
In recent years, the use of furadan seed dressing control cotton aphid, as a result of good effect, long duration and stimulate the growth of crops, welcomed by the masses. However, due to a single, continuous (that is unscientific continuous spraying in the growing season), the use of high doses, leading to a declining effect of control. To this end, we tested 96% carbofuran against local cotton aphids in 1986 and 1987. First, the method: 1. Preparation of carbofuran series concentration: According to the preliminary test results, the preparation of 5-6 series of concentrations, so that cotton aphid mortality in the range of 10-95%. 2. Sampling: Cotton aphids were collected in cotton fields that had never been spray-controlled before the aphids were in full bloom in early June. The cotton aphids were taken back to the room with a brush and selected on a white paper Measurement.