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应用化学农药防治蔬菜害虫,在田间操作中首先遇到的问题是掌握好喷药防治适期。对此,失败的教训告诉我们:防治偏早药剂控制不住后续大批害虫的发生,防治过晚药剂除治不了老龄耐药害虫的危害,偏早过晚都会造成防效降低、农药浪费。那么如何确定种植蔬菜上的害虫防治时期呢?成功的经验告诉我们:防治蔬菜害虫的时期选择要自我掌握。从寻预报、忆往年、勤打听、看四邻、观动向、查实情等六方面的调研中,纵合
Application of chemical pesticides to control vegetable pests, the first problem encountered in field operations is to master the appropriate spraying control. In this regard, the lesson of failure tells us: early control of pesticides could not control the follow-up large number of pests, the prevention and treatment of late addition to drugs can not cure the dangers of aging resistant pests, too late too early will result in lower control efficiency, pesticide waste. So how to determine the period of pest control on vegetable cultivation? Successful experience tells us: the period of prevention and control of vegetable pests should be self-grasping. From looking for the forecast, recalling the past years, diligently listening to see the neighbors, viewing the trends, check the facts and other six aspects of research, longitudinal