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取40余种国内外农药,分别对柑桔害螨、蚜虫、蚧类和潜叶蛾等四大类主要害虫,采用多边测定、系统筛选的方法,选出尼索朗、螨死净、倍乐霸、托尔克、克螨特、卡死克、机油乳剂及叶蝉散等一批高效选择性或部分选择性药剂。大田试验结果表明,停用有机磷或有机磷和拟除虫菊酯类药剂,采用选择性药剂组合技术的实验区比常规区全年减少病虫防治费用14.91%—42.14%;同时,害虫天敌明显增加。据不完全统计,1988—1990年浙江桔区选择性药剂和部分选择性药剂的应用面积超过20余万公顷次;仅尼索朗一种药剂的使用面积就近11万公顷次,节约防治费用超过5000万元。研究结果阐明,在桔园内停止或控制使用对生态环境有严重破坏作用的有机磷和拟除虫菊酯类药剂是完全可行的,该项技术具有明显的经济、生态和社会效益。
Take more than 40 kinds of pesticides at home and abroad, respectively, the main pest insects mites, aphids, scale and leaf moth four major categories of insects, using the multilateral determination, the system screening method, selected Nisuo Lang, mites dead net, Music tyrants, Torque, a mite special, card death grams, oil emulsion and leafhoppers and a number of highly selective or selective pharmaceuticals. The results of field experiments showed that the use of selective combinations of pesticides in experimental areas reduced the pest control costs by 14.91% -42.14% compared with the conventional areas throughout the year. Meanwhile, the natural enemies of pests were significantly increased . According to incomplete statistics, in 1988-1990, more than 200,000 hectares of selective pesticides and some selective pharmaceuticals were applied in Zhejiang orange area. Only one drug of Nisolone was used for nearly 110,000 hectares and the cost of prevention and control was over 50 million yuan. The results of the study show that it is feasible to stop or control the use of organophosphate and pyrethroid pesticides that have serious damage to the ecological environment in the orangery. The technology has obvious economic, ecological and social benefits.