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乐果(Rogor)有效成分的化学名称0,0-二甲基-S(甲基氨基甲酰基)-二硫代磷酸酯,是高效低毒的内吸有机磷杀虫剂。在较低浓度下,对多种刺吸式口器害虫,如蚜虫、蓟马、潛叶蝇、锯锋及螨类等有强烈的触杀和内吸作用;在较高浓度下,对鳞翅目幼虫如苹果毒蛾、苹果巢蛾、梨小食心虫等也有显著效果。乐果在果树蔬菜上有极其广泛的使用前途。为了给合理使用提供科学依据,进行了下列试验。
The chemical name of the active ingredient of Rogor 0,0-dimethyl-S (methylcarbamoyl) -dithiophosphate, is a high efficiency and low toxicity systemic organophosphate insecticide. At lower concentrations, there are strong contact and inhalation effects on a variety of sucking mouthparts such as aphids, thrips, leaf miner, saw blade and mites; at higher concentrations, lepidopteran Head larvae such as apple moths, apple moths, pears moth and other insects also have a significant effect. Dimethoate fruit tree vegetables have a very wide range of future use. In order to provide a scientific basis for rational use, the following tests were carried out.