隨sui著zhe暖nuan冬dong現xian象xiang不bu斷duan出chu現xian,小xiao麥mai田tian麥mai蜘zhi蛛zhu越yue冬dong基ji數shu逐zhu年nian增zeng加jia,加jia上shang其qi蟲chong體ti較jiao小xiao,易yi被bei忽hu視shi,逐zhu漸jian由you次ci要yao害hai蟲chong上shang升sheng為wei主zhu要yao害hai蟲chong。它ta以yi刺ci吸xi式shi口kou器qi刺ci吸xi小xiao麥mai葉ye片pian汁zhi液ye,造zao成cheng受shou害hai麥mai葉ye出chu現xian針zhen刺ci狀zhuang白bai斑ban,嚴yan重zhong時shi整zheng張zhang葉ye片pian呈cheng灰hui白bai色se,逐zhu漸jian變bian黃huang、枯萎、死亡,造成減產。對麥蜘蛛蟲量較高的麥田,要及時施藥防治。可在麥蜘蛛若蟎低齡期用1.8%阿維菌素乳油5000~6000倍液,或15%噠蟎靈乳油2000~3000倍液,或40%氧樂果乳油1500倍液噴霧。注意加足水量噴霧,使藥液進入麥苗根部。選晴天中午麥蜘蛛出來活動時施藥效果好。同時,要加強田間管理,及時施肥、灌水、除草,確保田間不幹旱、雜草少、小(xiao)麥(mai)長(chang)勢(shi)良(liang)好(hao),減(jian)輕(qing)麥(mai)蜘(zhi)蛛(zhu)發(fa)生(sheng),增(zeng)強(qiang)植(zhi)株(zhu)抗(kang)逆(ni)能(neng)力(li)。灌(guan)水(shui)條(tiao)件(jian)好(hao)的(de)麥(mai)田(tian),可(ke)以(yi)在(zai)麥(mai)蜘(zhi)蛛(zhu)潛(qian)伏(fu)期(qi)灌(guan)水(shui),灌(guan)水(shui)時(shi)在(zai)入(ru)水(shui)口(kou)攪(jiao)動(dong)流(liu)水(shui),讓(rang)水(shui)帶(dai)泥(ni)漿(jiang),同(tong)時(shi)撥(bo)動(dong)麥(mai)株(zhu)使(shi)麥(mai)蜘(zhi)蛛(zhu)假(jia)死(si)落(luo)水(shui),隨(sui)即(ji)沾(zhan)泥(ni)而(er)死(si)。常(chang)年(nian)麥(mai)蜘(zhi)蛛(zhu)發(fa)生(sheng)較(jiao)重(zhong)的(de)田(tian)塊(kuai),可(ke)以(yi)因(yin)地(di)製(zhi)宜(yi)地(di)采(cai)取(qu)一(yi)些(xie)農(nong)業(ye)措(cuo)施(shi)。早(zao)春(chun)中(zhong)耕(geng),能(neng)殺(sha)死(si)大(da)量(liang)在(zai)土(tu)縫(feng)中(zhong)越(yue)冬(dong)的(de)麥(mai)蜘(zhi)蛛(zhu);麥收後淺耕滅茬,秋收後及早深耕,因地製宜輪作倒茬,可有效消滅越夏卵,減少蟲源。
手機版




