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万年青叶子上冒油怎么回事
更新时间: 2020-09-18 00:00:00  

主要是由于介壳虫危害所致,介壳虫类的排泄物,呈油渍状,稍粘性且有亮度。应以防治介壳虫为主要措施,然后仔细检查下,其株肯定有介壳虫的存在,此类虫害一般贴伏不动,形状、色泽多样,但危害性大、繁殖快速,一般需要专杀药剂防治,如杀扑磷、毒死蜱等效果良好。也可以用软抹布多擦拭几遍,只要脱离植物体,此虫便不能存活。

关键词: 万年青 叶子 怎么 回事

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