lajiaoyinganranbinghaierdaozhidaliangluoye,yanzhongshizhengzhuyepiantuoguangchengtuzhi,meiyouyepianzewufajinxingguanghezuoyong,zhizhuzuizhongshuaijiekusi,daozhiyanzhongjianchan。jinri,jizhezaishouguangshijitaizhenlajiaopengquzoufangshi,bushaocainongjiufanyingshangshuqingkuang,youyubunengzhengqueshibiebinghai,daozhiyaobuduizheng,fangzhixiaoguojiaocha。為此,記者總結出常見的引起辣椒嚴重落葉的四種病害,菜農朋友可供參考。
1.辣椒葉枯病。該病最大的特點是從下向上發展,病斑灰白色,中間有穿孔,發病後期用手一搖莖稈底部,葉片“嘩嘩”墜落,變成“光杆司令”。防治該病時建議噴施10%的苯醚甲環唑1500倍液+20%的噻菌銅600倍液,或20%的冠綠(咪鮮胺+鬆脂酸銅)800倍液。
2.辣(la)椒(jiao)細(xi)菌(jun)性(xing)葉(ye)斑(ban)病(bing)。該(gai)病(bing)在(zai)近(jin)段(duan)時(shi)間(jian)發(fa)生(sheng)較(jiao)多(duo),主(zhu)要(yao)發(fa)生(sheng)在(zai)上(shang)部(bu)葉(ye)片(pian)。發(fa)病(bing)初(chu)期(qi)葉(ye)片(pian)出(chu)現(xian)黃(huang)綠(lv)色(se)水(shui)浸(jin)狀(zhuang)小(xiao)點(dian),後(hou)期(qi)病(bing)斑(ban)變(bian)鐵(tie)鏽(xiu)色(se),而(er)且(qie)因(yin)失(shi)去(qu)葉(ye)肉(rou)隻(zhi)剩(sheng)下(xia)表(biao)皮(pi)而(er)顯(xian)得(de)薄(bo)脆(cui)。該(gai)病(bing)在(zai)高(gao)溫(wen)高(gao)濕(shi)環(huan)境(jing)下(xia)發(fa)展(zhan)很(hen)快(kuai),後(hou)期(qi)落(luo)葉(ye)嚴(yan)重(zhong),山(shan)東(dong)省(sheng)青(qing)州(zhou)地(di)區(qu)菜(cai)農(nong)俗(su)稱(cheng)該(gai)病(bing)為(wei)“細菌性黃梢子”。防治時噴施2%的加收米(春雷黴素)600倍液+72%的農用鏈黴素4000倍液,或者20%的葉枯唑1000倍液,或33.5%的淨果精(喹啉銅)750倍液。
3.辣la椒jiao白bai粉fen病bing。白bai粉fen病bing比bi較jiao易yi識shi別bie,發fa病bing時shi葉ye片pian上shang產chan生sheng白bai色se粉fen點dian,後hou期qi發fa展zhan成cheng大da片pian粉fen斑ban,布bu滿man整zheng個ge葉ye片pian,造zao成cheng植zhi株zhu落luo葉ye嚴yan重zhong。防fang治zhi該gai病bing可ke噴pen施shi25%的乙嘧酚1000倍液,或30%的醚菌酯水劑1000-1500倍液。
4.辣椒白星病。該病的識別要點是葉片上的病斑近圓形,白色小點,看上去像散落的白色星星,發病後期造成大量落葉。防治該病可噴施12%的鬆脂酸銅乳油500倍液,或14%的絡氨銅水劑300倍液。
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