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为确保苹果生产的顺利发展,提高果品的商品价值和果苗的外销声誉,必须采取果断措施,做好苹果绵蚜的查治工作,下决心在2～3年内彻底消灭其危害。根据苹果绵蚜的发生及为害特点,1985年我们在5个果园的816亩果
In order to ensure the smooth development of apple production and increase the commodity value of fruit and the export reputation of fruit seedlings, decisive measures must be taken to handle the investigation and treatment of apple blight aphid and to completely eliminate the harm within 2 to 3 years. According to the occurrence and damage characteristics of cotton aphid in apple, in 1985 we had 816 mus of fruit in 5 orchards