稻穗頸瘟是發生在穗頸﹙穗軸與稻穗連接部位﹚shangdedaowenbing。daosuijingshijiangdaoyezhizaodeguanghechanwushusongdaosuibudebijingzhidao，yeshidaozhuzuiyiganrandaowenbingdebuwei。shisuihou，yeqiaosongchi，weidaowenjunqinrukailefangbianzhimen。tongshisuizhougangshenchangshisuijingbuweibijiaoyounen，shidaozhuzuiboruodedifang。duiyuyixieganwenpinzhonghuokangxingjiaochadepinzhong，daowenbingjunhenrongyicongsuijingjieqinruerranshangdaowenbing。ranbinghou，suizhebingjundefanzhiheweihai，suijingjiehuaisi，shusongdaosuizideyangfentongdaobianbeizuduan，yushixingchengbaisuihuobielidedaosui
，nongminchengzhiwei“卡掌”﹙卡脖子﹚。一(yi)旦(dan)穗(sui)頸(jing)染(ran)上(shang)稻(dao)瘟(wen)病(bing)
，輕(qing)者(zhe)嚴(yan)重(zhong)減(jian)產(chan)，重(zhong)者(zhe)基(ji)本(ben)失(shi)收(shou)。近(jin)年(nian)來(lai)之(zhi)所(suo)以(yi)稻(dao)穗(sui)頸(jing)瘟(wen)發(fa)病(bing)嚴(yan)重(zhong)，主(zhu)要(yao)原(yuan)因(yin)是(shi)防(fang)治(zhi)不(bu)力(li)，在(zai)防(fang)治(zhi)上(shang)存(cun)在(zai)以(yi)下(xia)誤(wu)區(qu)。

 

白穗時才施藥 稻dao瘟wen病bing病bing菌jun剛gang侵qin入ru時shi
，一yi般ban不bu表biao現xian症zheng狀zhuang，發fa病bing初chu期qi表biao現xian不bu明ming顯xian。而er等deng到dao穗sui頸jing因yin病bing壞huai死si而er出chu現xian白bai穗sui時shi再zai防fang治zhi，為wei時shi已yi晚wan。防fang治zhi稻dao頸jing瘟wen一yi般ban要yao在zai破po口kou始shi穗sui期qi用yong藥yao，感gan瘟wen品pin種zhong或huo不bu抗kang瘟wen品pin種zhong或huo生sheng長chang過guo旺wang的de丘qiu塊kuai，還hai要yao在zai齊qi穗sui期qi﹙抽穗達80%左右時﹚再用藥一次。苗瘟不嚴重的丘塊抽穗時不用藥。苗瘟是發生在苗期﹙分蘖期﹚dedaowenbing
，yusuijingwenxiangbi，jinshifashengshijianhebuweibutongeryi。youxiepinzhong，jiaokangmiaowen
，danweibikangsuijingwen。qiedaowenbingfashengshouhuanjingyingxiangjiaoda，fennieqifabingtiaojianbushiyi，miaowenfashengyekenengbingbuyanzhong
；如ru穗sui期qi條tiao件jian適shi宜yi
，又you可ke能neng表biao現xian出chu感gan病bing。如ru果guo是shi感gan瘟wen品pin種zhong或huo不bu抗kang病bing品pin種zhong，穗sui期qi又you遇yu陰yin雨yu溫wen濕shi條tiao件jian，無wu論lun苗miao瘟wen發fa生sheng輕qing重zhong
，都dou可ke能neng導dao致zhi穗sui頸jing瘟wen的de大da流liu行xing。因yin此ci，如ru果guo是shi感gan瘟wen品pin種zhong或huo不bu抗kang瘟wen品pin種zhong，或huo者zhe是shi曆li年nian稻dao瘟wen病bing發fa生sheng嚴yan重zhong的de地di區qu或huo丘qiu塊kuai，即ji使shi苗miao瘟wen不bu嚴yan重zhong，也ye要yao加jia強qiang對dui穗sui頸jing瘟wen的de防fang治zhi
，抓zhua住zhu破po口kou始shi穗sui期qi齊qi穗sui期qi、各用藥1次。

抗瘟較強的品種在抽穗時不用藥 對(dui)稻(dao)瘟(wen)病(bing)絕(jue)對(dui)抗(kang)病(bing)的(de)品(pin)種(zhong)是(shi)沒(mei)有(you)的(de)，抗(kang)性(xing)是(shi)相(xiang)對(dui)的(de)。雖(sui)然(ran)抗(kang)瘟(wen)品(pin)種(zhong)發(fa)病(bing)率(lv)明(ming)顯(xian)低(di)於(yu)感(gan)病(bing)品(pin)種(zhong)，但(dan)是(shi)如(ru)果(guo)種(zhong)植(zhi)在(zai)常(chang)年(nian)發(fa)病(bing)嚴(yan)重(zhong)的(de)地(di)方(fang)或(huo)丘(qiu)塊(kuai)﹙農民稱之為稻瘟病的老窩﹚，或偏施氮肥、營養生長過旺、抽穗期遇上陰雨連綿的天氣，也可能發病。對於常年發病丘塊，即使是抗性品種
，也要注意防治穗頸瘟
；偏施氮肥、營養生長過旺的丘塊，無論是抗病品種還是感病品種，都不可忽視對穗頸瘟的防治。

抽穗期遇雨不用藥 chousuiqichuxianyinyutianqiyoukenengyanzhongfabing，ruganwenpinzhongzhongzhimianjijiaodadedifang
，haikenengyinqisuijingwendedaliuxing。yinci
，fangzhisuijingwenyaozaishuidaopokoushisuiqiheqisuiqigeshiyao1次，施藥後8小時內遇雨還要補施。即使是陰雨天，也要搶住雨中間隙用藥。優質稻、多年種植的品種或組合
、苗瘟比較嚴重的丘塊、植株生長過旺的稻田、山陰田、冷浸田及抽穗期降雨的丘塊，都要在破口始穗期、齊穗期各用藥1次。一般每667平方米每次用20%三環唑150克或40%富士一號100克，對水60～70公斤配成藥液噴施，將植株噴透。交替使用對口農藥可以提高防治效果。