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研究了在灌根和喷雾2种施药方式下,不同浓度的25%噻虫嗪水分散粒剂对苹果黄蚜的防治效果。结果表明,喷雾处理对苹果黄蚜的速效性较好,25%噻虫嗪水分散粒剂6 000、3 000倍液分别在喷雾后3～7天、3～10天将虫口量控制在经济阈值以下;灌根处理对苹果黄蚜的速效性较差,25%噻虫嗪水分散粒剂500倍液灌根处理药效最好,在灌根处理后7～30天将虫口量始终控制在经济阈值之下,25%噻虫嗪水分散粒剂3 000倍液在灌根处理后14～21天将虫口量始终控制在经济阈值以下;25%噻虫嗪水分散粒剂3 000倍液灌根、喷雾处理的持效期基本相同;综合分析认为,用25%噻虫嗪水分散粒剂防治苹果黄蚜时喷雾法优于灌根法。
The effects of different concentrations of 25% thiamethoxam WP on the control of apple yellow aphids were studied under the two irrigation modes of irrigation and spraying. The results showed that spray-treated apple aphid quick-acting better, 25% thiamethoxam water dispersible granules 6 000,3 000 times the spray 3 to 7 days after spraying, 3 to 10 days to control the amount of insect population in the economy Threshold value below; irrigating the root of apple aphid the quick-acting poor, 25% thiamethoxam water dispersible granules 500 times the best effect of irrigation treatment, 7 to 30 days after the irrigation treatment of the population will always control the amount of insects Under the economic threshold, 25% thiamethoxam water dispersible granules 3000 times liquid in the rooting 14 to 21 days after the population control the amount of insects below the economic threshold; 25% thiamethoxam water dispersible granules 3000 times Liquid irrigation root, spray treatment of the same duration; a comprehensive analysis that the use of 25% thiamethoxam water dispersible granules against apple aphid spraying method is better than the irrigation method.