近期零星小雨、田间湿度温和,既不冲刷蚜虫,又适宜蚜虫繁殖,气温适宜加速虫卵孵化,棉蚜种群快速激增。蚜虫吸食棉叶汁液,造成卷叶,阻碍光合作用,严重抑制棉花现蕾。
防控优先选用吡虫啉、啶虫脒、噻虫嗪药剂,交替喷施避免抗药性;重点喷施叶片背面,滴水不漏;避开小雨间隙施药,雨后补喷;同步清除田边杂草,切断虫源,压低基数。搁浅#棉蚜
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