【摘要】 水稻、小麦及苞菜等难以被药液润湿的植物,临界表面张力小,棉花、黄瓜等易被药液润湿的植物,临界表面张力大。用表面活性剂降低溶液的表面张力后,在水稻和苞菜上的持液量增加,但在棉花和豇豆上的持液量下降。测定的30种常规杀虫剂中,大多数药剂推荐剂量药液的表面张力介于水稻和棉花等作物之间,不利于增加在这些作物的持液量。更多还原

【Abstract】 The critical surface tension of rice, wheat, wild-cabbage and others on which pesticides wetted and spread difficultly was small and that of cotton and cucumber and others on which pesticides wetted and spread easy was large. After the surface tension of the liquid was reduced by surfactant, the quantity of the liquid maintained on the leaves of rice and cabbage was increased and on the leaves of cotton and cowpea was decreased. The surface tension of the most among 30 insecticides measured in laboratory was larger than rice and smaller than cotton, which was disadvantageous to increase the quantity of the liquid maintained on the plants.更多还原