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近年茶小绿叶蝉(Empoasca flavescens)为害茶树日趋严重,影响茶叶产量和品质,过去用有机磷类农药防治,污染环境且杀伤天敌,不利于茶园害虫的综合治理。1992年5月,我们以20％扑虱灵乳油(湖北江陵星火化工厂生产)500倍液用手动压缩喷雾器,均匀喷布于叶片正反面,每试验小区(200m~2)喷30公斤,重复2次,并设40％乐果乳剂(湖南常德市化工厂生产)1500倍液和等量清水作对照。分别于药后1、3、5、10、15、30天调查防效。 结果药后3天的虫口减退率和校正虫口减退率分别为25.18％和27.36％;药后5天为64.21％和66.46％;药后10天为91.61％
In recent years, Empoasca flavescens damage tea growing increasingly serious, affecting the yield and quality of tea. In the past, the use of organophosphate pesticides to prevent and control, polluting the environment and killing natural enemies was not conducive to the comprehensive management of tea pests. In May 1992, we sprayed 500 times of 20% poppy cream (produced by Xinglong Chemical Plant, Jiangling, Hubei Province) on the front and back of the leaves with a manual compression sprayer. Each test plot (200m ~ 2) sprayed 30kg 2 times, and set 40% dimethoate emulsion (Hunan Changde Chemical Factory production) 1500 times the same amount of water and water as a control. Control effects were investigated at 1, 3, 5, 10, 15 and 30 days after treatment respectively. Results Three days after treatment, the rates of reduction of the population and the rates of the correction of the population were 25.18% and 27.36% respectively, 64.21% and 66.46% on the 5th day after drug treatment and 91.61%