藥物防治病蟲(chóng)害

蘋果樹(shù)落葉后,幼齡樹(shù)應(yīng)對(duì)樹(shù)盤進(jìn)行樹(shù)干基部培土,防止基部根系受凍。還可對(duì)樹(shù)干基部及主枝涂一層生石灰水,使之形成一層保護(hù)膜,封閉氣孔,預(yù)防“抽條”。進(jìn)入休眠期后,病菌的抗性減弱,而果樹(shù)的抗性開(kāi)始增強(qiáng),因此休眠期用藥很有 ......（本文共 225 字 ）     [閱讀本文] >>