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使用甲拌磷处理棉种,不仅能防治棉蚜及苗期病虫害,促进棉株生长,且能提高棉花产量18.4—51.6％,质量也可有很大提高。純甲拌磷为无色无臭油状液体,其工业品为棕色油状液体,有异臭,可溶于有机溶剂及动植物油中,在水中溶解度为50—80毫克/升,蒸汽压在20℃时为8.4×10~(-4)毫米汞柱,在酸、碱性介质中均可分解,在碱性介质中分解較快。甲拌磷为剧毒农药,小鼠口服半数致死量为1.75毫克/公斤,大鼠为2.0—3.7毫克/公斤。呂伯欽等报告,小鼠半数致死量为4.8
The use of phorate treatment of cotton seed, not only can control cotton aphids and seedling pests and diseases, promote cotton plant growth, and can increase cotton yield 18.4-51.6%, the quality can also be greatly improved. Pure phorate is a colorless and odorless oily liquid. The industrial product is a brown oily liquid with an offensive odor and is soluble in organic solvents, animal and vegetable oils, and has a solubility in water of 50-80 mg / l and a vapor pressure of 20 ° C When 8.4 × 10 ~ (-4) mmHg, in acid, alkaline medium can be decomposed in the alkaline medium decomposition faster. Phorate is a highly toxic pesticide, with a lethal dose of 1.75 mg / kg for mice and 2.0-3.7 mg / kg for rats. Lü Boqin and other reports, the mouse half lethal dose of 4.8