论文部分内容阅读
据《国外科技动态》介绍,印度的棉花由于棉铃虫为害,每年减产30—50%,消耗的农药大约有60%用于棉花。人们发现防治棉铃虫等,提高棉花产量的最有希望的农药是合成除虫菊酯类。由于这种农药比较贵,印度中央棉花研究所哥印拜陀地区棉花试验站的昆虫学家,研究成功一种既简便又经济的方法。这种新方法是:对地里的棉花,一行撒药,一行不撒药。采用这种隔行撒的结果,使每公顷收30.23公担籽棉,同时与每行都撒
According to “Foreign Science and Technology News” introduction, India’s cotton bollworm damage due to the annual reduction of 30-50%, about 60% of consumption of pesticides for cotton. It is found that the most promising pesticides for controlling cotton bollworm and increasing cotton yield are pyrethroids. As this pesticide is more expensive, entomologists at the Coimbatore Regional Cotton Pilot Station at the Central Cotton Research Institute in India have succeeded in finding a simple and economical way to succeed. This new method is: on the ground of cotton, his party sachet, his party does not spread drugs. As a result of this interlacing, 30.23 kgs of seed cotton per hectare was collected while spreading with each row