[問題] 不知名的白色物體
各位好,想請問一下
長期以來家裡的薔薇(種在土裡的) 枝幹上都會有蠻多白色的東西如下圖
是都不會影響植物到生長,只是看了有點不舒服,而且螞蟻好像也會聚集在那附近
請問這是什麼呢?如果是有害的,該怎麼用非農藥的方式去除呢
謝謝哦
http://i.imgur.com/s4vzcG9.jpg
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