应用内吸性农药防治栗瘿蜂

Utilization of Systemic Insecticides to Control Gall Wasp of Chestnut

选用常用的内吸性农药,每年4月初用直接涂枝、刮皮涂枝的方法防治栗瘿蜂幼虫。经过3a的试验结果表明:用50％甲胺磷乳油原液,40％氧化乐果乳油原液,5倍液刮皮涂枝处理均有较好的效果,最大虫口减退率在60％以上。生产上选用40％氧化乐果5倍液刮皮涂枝施药两次效果最好,而且对板栗上其他刺吸式口器的害虫也能起到兼治作用。

During 1987～1989, control of gall wasp larvae on chestnut was made by use of systemic insecticides in every early April. The results showed that brushing branches using 50% methamidophos and 40% omethoate or brushing phloem after the bark was acraped using water solution of 40% omethoate (omethoate:water=1:5) had all a good effect to control gall wasp larvae on chestnut. The most percentage of decreased pest population was over 60%. Brushing 8% omethoate twice to phloem had the best result in field practics; it could control not only gall wasp but also the other pests with piercing-sucking mouthparts on chestnut trees.