论文部分内容阅读
为筛选除治棉花苗蚜的有效药剂 ,廊坊市植保站于１９９９年进行了２０%螨蚜净乳油等药效试验 ,上年茬口为棉花 ,供试品种为石远３２１,４月２７日播种 ,播量６６７ （亩）１．２５ｋｇ（公斤） ,播前６６７ 用磷酸二铵２０ｋｇ,尿素１０ｋｇ,硫酸钾１５ｋｇ,牛粪５００ｋｇ作
In order to screen for the effective treatment of cotton seedling aphid, the plant protection station in Langfang City carried out the efficacy test of 20% mite aphid net EC in 1999. The last crop was cotton, the tested variety was Shi Yuan 321, and sowed on April 27 , Sowing 667 (mu) 1.25kg (kg), 667 before sowing with diammonium phosphate 20kg, urea 10kg, potassium sulfate 15kg, cow dung 500kg