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番茄叶霉病的防治方法。

问答题
2021-08-29 20:43
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正确答案

(1)选用抗病品种
(2)温室消毒:定植前按每立方米空间用硫磺粉2g加锯末4-5g,密闭棚室后点燃,熏烟24小时
(3)药剂防治
45%百菌清烟剂(安全型)每亩次250g熏一夜
50%多菌灵可湿性粉剂1000倍液,75%百菌清可湿性粉剂500-700倍液
时间:发病初期。用法:喷洒,隔7-10天防治1次,共2-3次


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