论文部分内容阅读
以往防治蚜虫主要采用乐果乳剂喷雾,但由于长年使用一种药物的结果,会使蚜虫产生抗性,防治效果很不理想。为了有效地防治蚜虫,1985年我们采用久效磷进行了防治试验。获得良好效果。用50％久效磷乳剂3000倍液,每亩喷施150斤。喷药24小时后,防效达96～100％。而对照农药40％乐果乳剂800倍液的防效为82％左右。而且久效磷的残效期较长,在整个生
In the past, aphids were mainly used to control dimethoate spray. However, as a result of long-term use of one drug, the aphids will be made resistant and the control effect is not very satisfactory. In order to effectively control aphids, we used monocrotophos in 1985 to prevent and control the experiment. Get good results. 50% monocrotophos emulsion 3000 times, spraying 150 pounds per mu. After spraying for 24 hours, the control efficiency reaches 96% to 100%. The control pesticide 40% dimethoate 800 times the liquid control effect is about 82%. Moreover, the residual effect of monocrotophos longer, throughout the students