北京園林綠化林木防治害蟲的辦法

瀏覽次數:2858來源:富慧言園林


北京園林綠化林木防治害蟲多選用噴藥法,這種辦法雖有必定的防治效果,但很多藥液彌散于空氣中污染環境,簡單構成人畜中毒,且對白楊透翅娥、桑天牛、光肩星天牛、蒙古大蠹蛾等蛀干害蟲,通常噴藥辦法很難見效,有必要選用特別辦法,現介紹幾種對于以上病害的防治辦法:

樹干涂藥法:防治楊柳、刺槐、山楂、櫻桃等樹上的蚜蟲、金花蟲、紅蜘蛛和松樹類上的介殼蟲等害蟲,可在樹干距地上2米高部位涂改內吸性農藥如氧化樂果等農藥,防治效果可達95%以上。此法簡單易行,若在涂藥部位包扎綠色或藍色塑料紙,藥效非常好。塑料紙在藥效閃現5至6天后免除,以免包扎處腐朽。

毒簽刺進法:將事前制作的毒簽刺進蟲道后,藥與樹液和蟲糞中的水分觸摸發生化學反應構成劇毒氣體,使樹干內的害蟲中毒逝世。將磷化鋅11%、阿拉伯膠58%、水 31%合作,先將水和膠放入燒杯中,加熱到80℃,待膠溶化后加入磷化鋅,拌勻后即可運用,運用時用長7至10厘米、直徑0.1至0.2厘米的竹簽蘸藥,先用無藥的一端打聽蛀孔的方向、深度、巨細,后將有藥的一端刺進蛀孔內,深4至6厘米,每蛀孔1支。刺進毒簽后用黃泥封口,以防漏氣,毒殺鉆蛀性害蟲的防治效果達90%以上。

樹干打針法:天牛、柳癭蚊、松梢螟、竹象蟲等蛀害林木樹干、樹枝、樹木皮層。用打針打針法防治效果顯著??捎描F鉆在樹干離地上20厘米以下處,打孔3至5個(詳細鉆孔數目依據樹體的巨細而定),孔徑約0.5至0.8厘米,深達木質部3至5厘米。打針孔打好后,用獸用打針器將內吸性農藥如氧化樂果、殺蟲雙、甲胺磷等慢慢寫入打針孔。注藥量依據樹體巨細而定,通常樹高為2.5米,冠徑為2米擺布的樹,每株打針原藥1.5至2毫升,幼樹每株打針1至1.5毫升,成年大樹可適當添加打針量,每株2至4毫升,注藥一星期內害蟲即可很多逝世。

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