柑桔红蜘蛛是我地柑桔的主要害虫之一,往年应用氧化乐果、三氯杀螨醇、杀虫脒、甲胺磷等多种农药防治,由于长期连续使用,害虫产生抗药性,防治效果降低。为此,近3年来采用20％烧碱NaOH)溶液加洗衣粉喷布(其配比是烧碱15毫升,洗衣粉15克,水7.5公斤),进行多点试验,均收到 Citrus red spider is one of the main pests of citrus in our country. In the past years, the pesticides such as omethoate, dicofol, chlordimeform, methamidophos and many other pesticides were used for prevention and control. Because of long-term continuous use, pests produce resistance and the control effect is reduced. To this end, the past 3 years with 20% caustic soda NaOH) solution plus detergent spray (the ratio is 15 ml of caustic soda, 15 grams of detergent, water 7.5 kg), multi-point test, have received