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青岛月季园闹腻虫,打药熏跑赏花人。我们搬来三箱“援军”:草蛉幼虫吃蚜虫(一天啃80只),瓢虫专治介壳虫赤眼蜂灭蛾卵。在花丛插黄色粘板当“虫虫情报站”,粘满害虫就派天敌突击队。为引益虫常驻,地头种了薄荷招草蛉,角落堆枯木养瓢虫。两年下来农药用量减七成,园里多了鸟窝蜂巢,小学生都来上生态课。老花农笑称:“这比请保安管用,虫虫警察二十四小时巡逻!”
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