“3911”又名甲拌磷,也叫西梅脱,是一种剧毒有机磷内吸杀虫药剂,具有胃毒、触杀、熏蒸等作用。棉籽经“3911”拌种、浸种,出苗后,小叶和真叶带毒,在一定时间内对棉蚜、红蜘蛛、蓟马等吸食汁液的害虫,有很好的防治效果;还可兼治蛄蝼、种蝇,对金针虫、蛴螬也有效。 “3911”治蚜效果的大小与用药量多少有关,用量大,持效长,但用量过大,往往引起药害,对出苗有影响,一般使用浓度以有效成份0.4—0.75％ “3911” also known as phorate, also known as West Mei off, is a highly toxic organophosphate insecticide, with stomach poisoning, contact kill, fumigation and so on. Cottonseed has good control effect on the pests of aphids, spider mites, thrips and other smoking juices in a certain period of time after being soaked and soaked in seeds and seedlings after emergence.蝼, species of flies, insects on the wire, 蛴 螬 also effective. “3911” The size of the effect of aphids and the amount of medication related to the amount of large, long-lasting, but the amount is too large, often causing injury, the emergence of the impact of the general use of the active ingredient concentration of 0.4-0.75%