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富贵竹有斑点怎么办

更新时间: 2020-09-27 00:00:00     

富贵竹叶斑病症状:

病斑初期为褐色斑点,边缘黄色;扩展后病斑近圆形,中央灰色,边缘黑褐色,周围黄色;在潮湿条件下病斑上出现黑色粒状物。防治方法:

防止植株过密,保持通风透光;发病初期用42%克菌净粉剂3000倍液,或88%水合霉素1000倍液,或25%络氨铜800倍液,每隔5~7天喷1次,连喷2~3次。

关键词: 富贵竹 斑点 怎么办

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