【摘要】 <正> 5％Bestox乳剂为氯氰菊酯类型的杀虫剂,通用名Alphamethrin,中文暂用名腈二氯苯醚菊酯。化学名称:（±）L-氰基-3苯氧苄基（±）-顺-反-2.2-二甲基-3-（2,2-二氯乙烯基）环丙烷-1-羧酸酯。分子式 C₂₂H₁₉Cl₂NO₃,分子量416.31,结构式更多还原

【Abstract】 Experiments on the residual kinetics of Bestox emulsion (5%) were carried out in the cotton fields. The results showed that the half-life of Bostox emulsion (5%) was 23 to 25 days in soil, and 3 to 5 days on leaves. The residues were not observed in cotton seeds even by using dosages 1.5 to 2.0 times of the conventional ones. Bestox is low toxic to mammals and there is no systemic action. The results can give a reliable basis for rationalizing the use of Bestox in the cotton field and limtingMRL value in cotton seeds. (See pp. 38-41)更多还原