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月季虫害防治绝招 红蜘蛛黑斑白粉蚜虫史上最全攻略 |
点评
你每周喷洗一次叶背就没虫子,发现有白粉黑斑再打药,这样几个月才打一次药,我介绍的药都是低毒的.
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点评
如果太严重就中剪或重剪一次,清理掉严重的叶子,再按我介绍的方法做.
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