红蜡蚧是柑桔上的主要害虫,遍及全国各柑桔产区。柑桔被害后,影响正常的光合作用,抽梢量减少,枯枝多,树势衰退,降低果实品质和产量。经过几年来的试验,肯定了氧化乐果是防治红蜡蚧的有效药剂。 40％氧化乐果是一种触杀性内吸杀虫剂,虽口服毒性稍高(大鼠LD_(50)50毫克/公斤),但接触毒性较低(大鼠经皮LD_(50)1000毫克/公斤);且在植物体内能很快降解。使用方法是,应用40％氧化乐果500～1000倍水稀释,喷雾两次,于5月下旬幼蚧上梢盛期和6月底幼蚧上梢末期, Red wax scale is the main pests on citrus, citrus throughout the country. Citrus damage, affecting the normal photosynthesis, decoction to reduce the number of dead branches, tree decline, reducing fruit quality and yield. After several years of testing, it was confirmed that omethoate is an effective agent for the control of red wax scale. 40% Omethoate is a contact insecticide with a slightly higher oral toxicity (LD 50 (50 mg / kg) but lower exposure toxicity (LD 50 per 1000 mg / Kg); and can quickly degrade in plants. Use method is to apply 40% omethoate 500 to 1000 times diluted with water, spray twice in late May and the end of jaundice at the end of June last year,