银杏叶:银杏是城市常见的绿化树种,秋天有大量落叶。将搜集到的银杏叶片晒干碾碎拌入盆土中,可防治金针虫、地蚕(金龟子幼虫)等。以250克鲜叶兑1000毫升水的比例浸泡后反复揉搓,得到的浸出液用来喷洒植株,可防治蚜虫。

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