华南棉花优质高产高效栽培研究Ⅱ.不同浓度高效氯氰菊酯对棉叶蝉的防治效果

不同浓度高效氯氰菊酯对棉叶蝉的防治效果及其对铃重、铃数的影响研究结果表明:高效氯氰菊酯250～300 倍对棉叶蝉有较好的防治效果,药后1 d和药后7 d的防效均为91%,药后14 d的防效为92%,持效期为14 d左右;此外,高效氯氰菊酯250～375 倍有较好的保叶效果,且对棉花质量没有产生不良影响.

High quality, high yield, high efficiency planting of cotton in South China Ⅱ.Effect of different beta-cypermethrin disposal levels against empoasca biguttula

This paper discussed the effect of different Beta-cypermethrin disposal levels against Empoasca biguttula. And it also discussed their different influences to the weight and number of the cotton fruits. The results showed that the suitable dilute times were 250-300, it provided 91% control efficiency against Empoasca biguttula for the first 7 days. And 14 days after application, it provided 92% control efficiency. The persistent period was about 14 days. The dilute times were 250-375 that provided the best protection to the cotton leaves, and it had no bad influence to the cotton quality.