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为了评价辛硫磷在棉花上使用的安全性,建立其使用规范。于2010-2012年在杭州和商丘两地进行了氟铃·辛硫磷20%乳油在棉花上的消解动态和最终残留实验。消解动态试验结果表明:在植株和土壤中半衰期分别为0.62~0.81d和2.4~2.8d。最终残留试验表明:氟铃·辛硫磷20%乳油按300g a.i./ha和450g a.i./ha施药,虫害发生期施药3次和4次,末次施药后7、15、21d采集土壤样品和棉花样品,土壤和棉籽中辛硫磷的残留量均<0.05mg/kg。
In order to evaluate the safety of phoxim in cotton use, establish its use specification. In 2010-2012, two experiments were conducted in Hangzhou and Shangqiu for the digestion kinetics and final residues of flurandrin and phoxim 20% EC on cotton. The dynamic test results of digestion showed that the half-lives in plant and soil were 0.62 ~ 0.81d and 2.4 ~ 2.8d, respectively. The final residue test showed that the soil samples were collected at the rate of 300g ai / ha and 450g ai / ha when the pesticides were treated with 20% EC and 20% EC. The soil samples were collected three times and four times during the pest occurrence period, And cotton samples, soil and cotton seed phoxim residues were <0.05mg / kg.