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长绵粉蚧在陕西省苹果园1 a发生1代,以3龄若虫在树干、大枝粗皮缝隙处结茧越冬。4-5月为主要为害期,出蛰若虫和成虫吸食苹果树枝、叶、果实的汁液,削弱树势。防治上应重点抓好果树开花前越冬若虫出蛰期和6-7月1龄若虫发生期的化学防治;开花期-幼果期应以保护利用天敌为主,尽量避免喷洒化学农药。
Melastoma longan in apple orchards in Shaanxi Province 1 a generation occurred in order to 3 instar nymphs in the trunk, branches thick skin cocoon crevice wintering. April to May as the main period of harm, nymph nymphs and adults eat apple tree branches, leaves, fruit juice, weaken the tree potential. Prevention and control should focus on fruit trees before flowering Nymph nocturnal and 6-7 months of the first instar nymphs chemical control; flowering - young fruit should be based on the protection and use of natural enemies, as far as possible to avoid spraying chemical pesticides.