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红蜘蛛是柑橘类果树最重要的害虫之一,一般果农一年要喷药6~8次,既增加生产成本,又造成环境污染,果品农药残留超标。2017年夏季引进胡瓜钝绥螨进行柑橘红蜘蛛防治试验示范。结果证明,胡瓜钝绥螨防治柑橘红蜘蛛虽然防效比化学防治慢,但防效期长,红蜘蛛虫口密度不易反弹,在释放后30d,各释放小区对红蜘蛛防效都达到80%以上,50d后防效都在95%以上。柑橘园释放胡瓜钝绥螨防治红蜘蛛是绿色防控理想的选择。同时发现,夏季若气温偏低,且相对湿度大,有利于红蜘蛛的发生,高温干旱不利于红蜘蛛发生为害。
Spider mite is one of the most important pests of citrus fruit trees. Generally, fruit growers spray 6 to 8 times a year, which not only increases the production cost but also causes environmental pollution and the excessive pesticide residues in fruits. The summer of 2017 to introduce cucumber amblyseius mites for citrus red spider control experiment demonstration. The results showed that the cucumber Amblyseius citri guard and control the citrus red spider although the anti-efficiency than chemical control slow, but the long-term control effect, spider mite population density is not easy to rebound, 30d after release, the release of the spider on the control of the community have reached more than 80% , 50d after more than 95% control effect. Citrus Orchard release Cucumber Amblyseius mite prevention and control is the ideal choice for green control. It is also found that if the temperature is low and the relative humidity is high in summer, it is in favor of the occurrence of spider mite, and the high temperature and drought are not conducive to the occurrence of spider mite.