隨(sui)著(zhe)寒(han)冬(dong)的(de)到(dao)來(lai),反(fan)季(ji)節(jie)棚(peng)室(shi)蔬(shu)菜(cai)又(you)到(dao)了(le)生(sheng)產(chan)的(de)黃(huang)金(jin)時(shi)段(duan),但(dan)由(you)於(yu)棚(peng)室(shi)內(nei)溫(wen)濕(shi)度(du)相(xiang)對(dui)較(jiao)高(gao),造(zao)成(cheng)棚(peng)室(shi)內(nei)微(wei)型(xing)害(hai)蟲(chong)猖(chang)獗(jue)危(wei)害(hai),使(shi)棚(peng)室(shi)蔬(shu)菜(cai)生(sheng)產(chan)受(shou)到(dao)了(le)不(bu)同(tong)程(cheng)度(du)的(de)影(ying)響(xiang)。為(wei)減(jian)輕(qing)棚(peng)室(shi)蔬(shu)菜(cai)受(shou)害(hai)程(cheng)度(du),現(xian)將(jiang)棚(peng)室(shi)內(nei)常(chang)見(jian)微(wei)型(xing)害(hai)蟲(chong)危(wei)害(hai)症(zheng)狀(zhuang)及(ji)防(fang)治(zhi)措(cuo)施(shi)介(jie)紹(shao)如(ru)下(xia),供(gong)農(nong)民(min)朋(peng)友(you)參(can)考(kao)。
害蟲種類及危害症狀 白粉虱:在棚室內白粉虱1年可發生8~10代,冬季在室外不能存活。白粉虱成蟲和幼蟲吸取作物汁液,被害葉片退綠、變黃甚至萎蔫,最後枯死。此外,其成蟲、幼蟲還能分泌大量蜜露,汙染作物葉片和果實,引發煤汙病,使蔬菜失去商品價值。蚜蟲:棚室蚜蟲主要有桃蚜、蘿卜蚜、甘蘭蚜。桃蚜發生範圍最廣,主要危害十字花科蔬菜及菠菜、辣椒、茄子等。幼嫩葉片受害後,葉片下卷,並且畸形皺縮。薊馬:棚室蔬菜中常見的薊馬是瓜薊馬,以成蟲和若蟲吸取嫩葉、嫩梢、huaheyouguozhiyezaochengweihai,yemianshangchuxianhuibaiseshilvbandian,yanzhongshikedaozhihuaqizaoluo,yepianganku,xinshaowudingya,beihaiyepianyeyuanjuansuochengbowenzhuang,yemaidanhuanglvse,yerouchuxianhuangsecuoshangdian,sihuayezhuang,zuihoubeihaiyebianhuang、變脆、脫落。新梢頂芽受害,生長點受到抑製,枝葉叢生、頂芽萎縮。斑潛蠅:常發生的斑潛蠅主要有南美斑潛蠅、美洲斑潛蠅等。其主要危害十字花科蔬菜、茄科蔬菜以及大蔥、大(da)蒜(suan)等(deng)。斑(ban)潛(qian)蠅(ying)在(zai)作(zuo)物(wu)葉(ye)肉(rou)組(zu)織(zhi)內(nei)產(chan)卵(luan),幼(you)蟲(chong)蛀(zhu)食(shi)葉(ye)肉(rou),破(po)壞(huai)葉(ye)綠(lv)素(su),使(shi)葉(ye)片(pian)失(shi)綠(lv)變(bian)白(bai),降(jiang)低(di)光(guang)合(he)作(zuo)用(yong)效(xiao)率(lv)。葉(ye)片(pian)常(chang)因(yin)斑(ban)潛(qian)蠅(ying)幼(you)蟲(chong)危(wei)害(hai)而(er)產(chan)生(sheng)明(ming)顯(xian)蟲(chong)道(dao),造(zao)成(cheng)花(hua)葉(ye)受(shou)損(sun)。
防治措施 農業防治:首(shou)先(xian),在(zai)蔬(shu)菜(cai)收(shou)獲(huo)後(hou)及(ji)時(shi)清(qing)除(chu)殘(can)枝(zhi)敗(bai)葉(ye),並(bing)集(ji)中(zhong)銷(xiao)毀(hui),減(jian)少(shao)蟲(chong)源(yuan)。其(qi)次(ci),在(zai)下(xia)茬(cha)作(zuo)物(wu)種(zhong)植(zhi)前(qian),及(ji)早(zao)設(she)置(zhi)防(fang)蟲(chong)網(wang),防(fang)止(zhi)害(hai)蟲(chong)進(jin)入(ru)棚(peng)室(shi)。此(ci)外(wai),還(hai)要(yao)勤(qin)除(chu)草(cao)。物(wu)理(li)防(fang)治(zhi):銀灰色對蚜蟲有一定驅趕性,利用這一特點可在田間懸掛銀灰色膠膜條,驅趕蚜蟲;白粉虱喜黃色,可利用黃板塗抹機油誘殺。化學防治:可用滅蚜威、啶蟲咪等來防治蚜蟲和白粉虱。可選用10%吡蟲啉可濕性粉劑1500倍(bei)液(ye)噴(pen)霧(wu)進(jin)行(xing)防(fang)治(zhi)薊(ji)馬(ma)。需(xu)要(yao)注(zhu)意(yi)的(de)是(shi)無(wu)論(lun)用(yong)什(shen)麼(me)藥(yao)防(fang)治(zhi)哪(na)種(zhong)害(hai)蟲(chong),都(dou)需(xu)注(zhu)意(yi)田(tian)間(jian)觀(guan)察(cha),在(zai)害(hai)蟲(chong)發(fa)生(sheng)高(gao)峰(feng)前(qian)及(ji)早(zao)防(fang)治(zhi),噴(pen)藥(yao)部(bu)位(wei)必(bi)須(xu)均(jun)勻(yun),不(bu)同(tong)藥(yao)劑(ji)需(xu)輪(lun)換(huan)使(shi)用(yong),同(tong)一(yi)農(nong)藥(yao)使(shi)用(yong)次(ci)數(shu)最(zui)好(hao)不(bu)要(yao)超(chao)過(guo)3次。
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