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園藝作物土肥水管理及病蟲草害防治-資料下載頁

2025-02-21 10:51本頁面
  

【正文】 蟲等 幼蟲在樹干基部或主根的木質(zhì)部越冬。天敵有螞蟻、啄木鳥等。防治方法:農(nóng)業(yè)防治;人工、物理方法 干莖涂白、纏草繩;藥劑防治 殺螟松、馬拉硫磷乳油等。( 2)鱗翅目鉆蛀性害蟲 葡萄透翅蛾等;( 3)膜翅目鉆蛀性害蟲 梨莖蜂 根部害蟲 活動期或危害蟲態(tài)生活在土中的一類害蟲; 320余種; 危害時間長,播種到收獲均危害; 咬食幼苗、根、種子及塊根、塊莖等。 秦嶺、淮河以南以地老虎為主,以北以螻蛄、蠐螬為主; 江浙一帶三者并重; 華南大蟋蟀危害突出。 防治主要藥劑拌種、土壤處理、毒餌和毒水澆灌等結(jié)合。3 雜草及防治 種類有 5萬多種,其中農(nóng)業(yè)雜草 8千多種; 危害: 降低產(chǎn)量和品質(zhì); 誘發(fā)病蟲害; 提高生產(chǎn)成本。雜草防治:農(nóng)業(yè)措施 輪作換茬,薄膜覆蓋等;化學防治 除草劑種類 選擇性及滅生性 觸殺性及內(nèi)吸性 土壤或莖葉處理 4 自然災(zāi)害及防御 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