蔬菜生产中病虫害防治应以预防为主
VEGETABLES（2003）
Abstract
当前在蔬菜生产中病虫害的防治往往只是把重点放在作物发病后或虫害发生后采用药剂防治,农药的用量一年比一年大,毒性越来越高,残留期越南来越长.
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