乐斯本 4 8 %ＥＣ(乳油 ,下同 )是广谱性硫逐式—硫代磷酸酯类中等毒性杀虫杀螨剂。 1 966年美国陶氏益农公司首先开发。该药兼具触杀、胃毒和熏蒸作用。在叶面上持效期较短 ,在土壤中持效期较长 ,达 2～ 4个月 ,且药效不受土壤温湿度及施肥的影响 ,因此对地下害虫防治效果良好 Rexben 4 8% EC (EC) is a broad-spectrum, sulfur-tolerant, moderately toxic insecticide and miticide. In 1966 the United States Dow AgroSciences first developed. The drug combines touch, stomach poisoning and fumigation. Short persistence on the foliage, persistence in the soil longer, up to 2 to 4 months, and the effect is not affected by soil temperature and humidity and fertilization, so the effect of underground pest control is good