优乐得是由日本研制开发的一种干扰昆虫正常新陈代谢的高效、低毒、低残留杀虫剂。主要对吸汁性的稻虱、叶蝉、粉虱和介壳虫有较强的杀伤作用。近年来经省外多点试验示范表明,该药持效期长,对天敌杀伤小,防效高。我们于1989年的第一代柑桔矢尖蚧若虫盛孵期进行田间药效试验,以期大面积示范 Excellent music is developed by Japan as a interference with the normal metabolism of insects efficient, low toxicity, low residue pesticides. Mainly juice-sucking louse, leafhopper, whitefly and scale insects have a strong killing effect. In recent years, demonstration tests conducted by many provinces outside the province have shown that the drug has a long-lasting effect, is less harmful to natural enemies and has a high prevention effect. In 1989, the first generation of Citrus grandiflorus nymphs nymphs during the incubation period of field efficacy trials to a large area demonstration