近(jin)日(ri),記(ji)者(zhe)在(zai)山(shan)東(dong)省(sheng)青(qing)州(zhou)市(shi)口(kou)埠(bu)鎮(zhen)采(cai)訪(fang)時(shi)有(you)不(bu)少(shao)菜(cai)農(nong)反(fan)映(ying),茄(qie)子(zi)中(zhong)下(xia)部(bu)葉(ye)片(pian)發(fa)黃(huang)並(bing)伴(ban)隨(sui)有(you)起(qi)泡(pao)現(xian)象(xiang),後(hou)期(qi)落(luo)葉(ye)嚴(yan)重(zhong),不(bu)知(zhi)是(shi)何(he)原(yuan)因(yin)?噴(pen)了(le)很(hen)多(duo)殺(sha)菌(jun)藥(yao)卻(que)沒(mei)啥(sha)效(xiao)果(guo),眼(yan)看(kan)著(zhe)茄(qie)子(zi)產(chan)量(liang)一(yi)天(tian)不(bu)如(ru)一(yi)天(tian),菜(cai)農(nong)們(men)對(dui)此(ci)焦(jiao)急(ji)萬(wan)分(fen)。經走訪調查,記者認為引起上述症狀的原因主要有以下幾方麵:
(1)yepianlaohuasuozhi。dangqianyidachayuanqiejieguohouqigenximuzhihuayanzhong,xinshengmaoxigenjiaoshao,daozhigenxixishounenglixiajiang,zhizhuchangshijianruo,zaijiashangcainongliuguoguoduo,shuifeigongyingbuzu,fangzhibinghaishishiyonggaonongduyaoyedeng,zheyangjiujiajuleyepiandeshuailaohuanghua。ercainongsuoshuodeqipaoxianxiangdaduoshushiyinweizaidianhuashijisuyaowudizaiyepianshangsuodaozhidejisuzhongdu,erbushibinghaihuoquesuyinqide,yincicainongyongyaohoubujianxiaoguo。
針(zhen)對(dui)這(zhe)種(zhong)情(qing)況(kuang),記(ji)者(zhe)建(jian)議(yi)從(cong)養(yang)根(gen)護(hu)葉(ye)角(jiao)度(du)出(chu)發(fa),采(cai)取(qu)措(cuo)施(shi)增(zeng)強(qiang)植(zhi)株(zhu)長(chang)勢(shi),避(bi)免(mian)早(zao)衰(shuai)。首(shou)先(xian),掀(xian)開(kai)地(di)膜(mo)劃(hua)鋤(chu),疏(shu)鬆(song)根(gen)係(xi)間(jian)土(tu)壤(rang),增(zeng)加(jia)土(tu)壤(rang)透(tou)氣(qi)性(xing),同(tong)時(shi)刺(ci)激(ji)新(xin)根(gen)萌(meng)發(fa),提(ti)高(gao)根(gen)係(xi)吸(xi)收(shou)能(neng)力(li)。其(qi)次(ci),注(zhu)意(yi)加(jia)強(qiang)肥(fei)水(shui)供(gong)應(ying),衝(chong)施(shi)芳(fang)潤(run)、燈塔等全水溶性肥料,效果更好。切不可因為菜價低就放鬆棚室管理,使植株整天處於“饑餓”狀態,這樣就更加不利於植株的正常生長,導致抗逆能力下降,葉片加快衰老,各種病害多發。最後,葉麵噴施愛多收6000倍混加氨基酸類葉麵肥,一方麵可解除激素中毒造成的藥害,另一方麵及時補充營養,延緩葉片衰老。
(2)葉(ye)黴(mei)病(bing)所(suo)致(zhi)。山(shan)東(dong)省(sheng)青(qing)州(zhou)市(shi)何(he)官(guan)鎮(zhen)新(xin)村(cun)的(de)李(li)師(shi)傅(fu)向(xiang)記(ji)者(zhe)介(jie)紹(shao),他(ta)棚(peng)內(nei)圓(yuan)茄(qie)的(de)中(zhong)下(xia)部(bu)葉(ye)片(pian)正(zheng)麵(mian)出(chu)現(xian)邊(bian)緣(yuan)不(bu)明(ming)顯(xian)的(de)黃(huang)斑(ban),有(you)的(de)黃(huang)斑(ban)在(zai)葉(ye)麵(mian)形(xing)成(cheng)凸(tu)起(qi),呈(cheng)泡(pao)泡(pao)狀(zhuang),而(er)葉(ye)背(bei)麵(mian)在(zai)濕(shi)度(du)大(da)時(shi)有(you)灰(hui)綠(lv)色(se)的(de)黴(mei)層(ceng),病(bing)情(qing)從(cong)下(xia)往(wang)上(shang)發(fa)展(zhan)很(hen)快(kuai),導(dao)致(zhi)落(luo)葉(ye)嚴(yan)重(zhong)。根(gen)據(ju)李(li)師(shi)傅(fu)所(suo)描(miao)述(shu)的(de)症(zheng)狀(zhuang),記(ji)者(zhe)判(pan)定(ding)這(zhe)是(shi)茄(qie)子(zi)葉(ye)黴(mei)病(bing)。通(tong)常(chang)情(qing)況(kuang)下(xia),棚(peng)內(nei)夜(ye)間(jian)溫(wen)度(du)過(guo)高(gao),相(xiang)對(dui)空(kong)氣(qi)濕(shi)度(du)過(guo)大(da)(高於90%),利於該病的發生和發展。
防治茄子葉黴病,重點是控製溫、濕shi度du,增zeng加jia光guang照zhao,避bi免mian棚peng內nei高gao濕shi環huan境jing。加jia強qiang水shui分fen管guan理li,澆jiao水shui改gai在zai上shang午wu,澆jiao水shui後hou立li即ji排pai濕shi,盡jin量liang使shi葉ye麵mian不bu結jie露lu或huo縮suo短duan結jie露lu時shi間jian。病bing害hai發fa生sheng初chu期qi,建jian議yi噴pen施shi47%的加瑞農可濕性粉劑800倍液,或阿米妙收1000倍液,或40%的氟矽唑乳油7000倍液+2%的春雷黴素600倍液+70%的甲基托布津1000倍液(此藥方不可摻加葉麵肥、殺蟲劑)進行防治。預防該病時,苗期可噴施春雷黴素,成株期可噴施世高或氟菌唑等藥劑。
(3)細菌性瘡痂病所致。“andapengqianlianchudeqiezideleyizhongguaibing,dixiayepianyoutuilvdehuangbandian,yezhengmiandebandiantuqigenpaopaoside,guomianshangyeqipaopao,jiugenjipigedayiyang,zheshishaqingkuanga?”shouguangshiwenjiajiedaodedongshifuzaidianhuazhongxiangjizhefanying。jizhechupanduankenengshiyaohai,yinweiyaohaicanliudeyaodiangenshangshuqingkuanghenxiangxiang,danshiyaohaiyibanxingchengdeshilveaoxiandebandianhuobankuai,erbushidongshifusuoshuodelongqide“泡泡”。記者谘詢本報專家後得知,很有可能是細菌性瘡痂病所致。
天tian氣qi轉zhuan暖nuan後hou,大da棚peng前qian臉lian處chu溫wen度du高gao濕shi度du大da,利li於yu細xi菌jun性xing病bing害hai的de發fa生sheng及ji傳chuan播bo。因yin此ci,應ying加jia強qiang棚peng室shi管guan理li,及ji時shi放fang風feng,放fang風feng排pai濕shi以yi預yu防fang此ci病bing發fa生sheng。建jian議yi菜cai農nong朋peng友you噴pen施shi72%的農用硫酸鏈黴素或新植黴素4000倍液,或50%的琥膠肥酸銅(DT)可濕性粉劑400-500倍液進行防治。
(4)蟎蟲所致。被蟎蟲侵害過的葉片背部呈灰褐或黃褐,葉片起泡,葉片邊緣向下卷曲。受害蕾和花,重者不能開花、坐果,果柄受害嚴重時呈木栓化,果實後期易龜裂。記者在下鄉采訪中了解到,今年的蟎蟲危害猖獗,不論辣椒、茄子還是無刺小黃瓜,植株從上至下的葉片全部被紅白蜘蛛、茶黃蟎“占領”,若蟲及蟲卵在葉背麵形成密密麻麻的一片,噴藥也不管用,有的菜農實在沒辦法就幹脆提早拔園。
zhenduiruheyouxiaofangzhimanchong,benbaozengzaiqianliangqizuoguoxiangxijieshao,cainongpengyoukecankaoyixia。tixingyidian,yaojifangzhishiyidingzhuyiquanpengpenbu,lunhuanyongyao,bimianhaichongchanshengkangyaoxing。muqianchangguideshamanyaojirueweijunsu、四蟎嗪、噠蟎靈等殺蟎效果甚微,建議菜農選用乙蟎唑、溴蟎酯、螺蟎酯等藥劑防治。
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