冬暖大棚黄瓜霜霉病防治内容摘要:
2、到 2833,超过35时放风,中午、下午温度降到 2025,相对湿度 65%70%,傍晚再放风3 小时,然后闭棚,使温度降到 112。 浇水要求在晴天上午进行,早上浇水,浇完后立即闭棚,温度上升到 3540后放风,再闭棚一次,提温放风。 熏烟防治用 40%百菌清烟剂熏烟,傍晚密闭大棚后,把药分成 45 份,每份50 克,均匀分布在棚内,用暗火点燃,着烟后闭门窗,次日早晨通风,隔七天熏一次,视病情连续 36 次。 喷雾防治发病初期,采用保护性杀菌剂和内吸性杀菌剂交替使用,用可杀得液或 力克 800 倍和 75%百菌清 600 倍 64%杀毒矾 400 倍交替喷雾,间隔 710 天。 叶面喷糖黄瓜生长后期,可喷 1%尿素和等量白糖溶液,宜在早晨进行,每隔5 天喷 1 次,共喷 4 次,注意喷在叶背面。 专利查询。冬暖大棚黄瓜霜霉病防治
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