截止7月11日，全市(shi)稻瘟(wen)(wen)病(bing)(bing)發(fa)生面積30萬(wan)畝，較(jiao)(jiao)上年(nian)同期增7.5%，發(fa)病(bing)(bing)田塊稻瘟(wen)(wen)病(bing)(bing)平均(jun)病(bing)(bing)葉(xie)率4.34%，較(jiao)(jiao)上年(nian)同期減1.86個(ge)(ge)百分(fen)點(dian)，合(he)川(chuan)局部(bu)田塊最高(gao)(gao)(gao)病(bing)(bing)葉(xie)率100%。2018年(nian)推廣品(pin)種(zhong)(zhong)(zhong)抗(kang)(kang)(kang)性跟(gen)蹤的(de)(de)(de)監(jian)(jian)測(ce)(ce)(ce)結(jie)果表明(ming)，我(wo)市(shi)稻瘟(wen)(wen)病(bing)(bing)生理(li)小種(zhong)(zhong)(zhong)有(you)6群(qun)(qun)(qun)24個(ge)(ge)小種(zhong)(zhong)(zhong)，主要分(fen)布在(zai)ZB群(qun)(qun)(qun)、ZE群(qun)(qun)(qun)、ZC群(qun)(qun)(qun)、ZA群(qun)(qun)(qun)，優勢小種(zhong)(zhong)(zhong)為ZE1、ZC11、ZE3、ZB31、ZB27、ZC15，與(yu)上年(nian)監(jian)(jian)測(ce)(ce)(ce)結(jie)果相(xiang)比，小種(zhong)(zhong)(zhong)的(de)(de)(de)分(fen)散度(du)較(jiao)(jiao)大，優勢種(zhong)(zhong)(zhong)群(qun)(qun)(qun)和優勢小種(zhong)(zhong)(zhong)集中度(du)有(you)所(suo)降低，但(dan)稻瘟(wen)(wen)病(bing)(bing)菌種(zhong)(zhong)(zhong)群(qun)(qun)(qun)組成仍然復雜多樣，毒性變異頻繁，具有(you)潛在(zai)的(de)(de)(de)致病(bing)(bing)性風(feng)險。同時(shi)，2018年(nian)148個(ge)(ge)品(pin)種(zhong)(zhong)(zhong)抗(kang)(kang)(kang)性跟(gen)蹤監(jian)(jian)測(ce)(ce)(ce)表明(ming)，葉(xie)瘟(wen)(wen)高(gao)(gao)(gao)抗(kang)(kang)(kang)或抗(kang)(kang)(kang)病(bing)(bing)的(de)(de)(de)品(pin)種(zhong)(zhong)(zhong)有(you)62個(ge)(ge)，占(zhan)41.9%；葉(xie)瘟(wen)(wen)感病(bing)(bing)有(you)20個(ge)(ge)，占(zhan)13.5%；頸(jing)(jing)瘟(wen)(wen)高(gao)(gao)(gao)抗(kang)(kang)(kang)或抗(kang)(kang)(kang)病(bing)(bing)的(de)(de)(de)品(pin)種(zhong)(zhong)(zhong)有(you)51個(ge)(ge)，占(zhan)34.4%；頸(jing)(jing)瘟(wen)(wen)感病(bing)(bing)或高(gao)(gao)(gao)感的(de)(de)(de)有(you)57個(ge)(ge)，占(zhan)38.5%。其中，葉(xie)瘟(wen)(wen)感病(bing)(bing)且頸(jing)(jing)瘟(wen)(wen)高(gao)(gao)(gao)感的(de)(de)(de)共15個(ge)(ge)品(pin)種(zhong)(zhong)(zhong)。與(yu)近年(nian)監(jian)(jian)測(ce)(ce)(ce)結(jie)果相(xiang)比，抗(kang)(kang)(kang)病(bing)(bing)品(pin)種(zhong)(zhong)(zhong)比例逐年(nian)提高(gao)(gao)(gao)，表明(ming)我(wo)市(shi)生產應用品(pin)種(zhong)(zhong)(zhong)的(de)(de)(de)抗(kang)(kang)(kang)病(bing)(bing)性水平整(zheng)體有(you)所(suo)提升，但(dan)部(bu)分(fen)品(pin)種(zhong)(zhong)(zhong)仍存較(jiao)(jiao)大流行風(feng)險。2019年(nian)我(wo)市(shi)主導推廣的(de)(de)(de)20個(ge)(ge)水稻品(pin)種(zhong)(zhong)(zhong)中，經渝(yu)東南農科院近3年(nian)稻瘟(wen)(wen)病(bing)(bing)抗(kang)(kang)(kang)性監(jian)(jian)測(ce)(ce)(ce)鑒定(ding)，感病(bing)(bing)或高(gao)(gao)(gao)感的(de)(de)(de)品(pin)種(zhong)(zhong)(zhong)有(you)13個(ge)(ge)，占(zhan)65.5%，其中高(gao)(gao)(gao)感的(de)(de)(de)有(you)8個(ge)(ge)品(pin)種(zhong)(zhong)(zhong)。
當前(qian)，我市(shi)(shi)中(zhong)低(di)山平壩(ba)地(di)(di)(di)區水(shui)稻(dao)(dao)(dao)正值處于抽穗(sui)期，高山水(shui)稻(dao)(dao)(dao)處于拔節-孕穗(sui)期。據市(shi)(shi)氣象預報(bao)，7月下旬-9月，我市(shi)(shi)各(ge)地(di)(di)(di)平均氣溫(wen)與(yu)常年同(tong)期相(xiang)比(bi)，西南(nan)部(bu)和(he)東南(nan)部(bu)偏高0.1-0.5℃，其余(yu)大(da)部(bu)地(di)(di)(di)區偏高0.6-1℃，與(yu)上(shang)年同(tong)期相(xiang)比(bi)，大(da)部(bu)地(di)(di)(di)區偏低(di)0.3-0.5℃。各(ge)地(di)(di)(di)降水(shui)量在600-900毫(hao)米(mi)之(zhi)間，與(yu)常年同(tong)期相(xiang)比(bi)，東北部(bu)偏少1-2成(cheng)，其余(yu)大(da)部(bu)分地(di)(di)(di)區偏多(duo)1-3成(cheng)，與(yu)上(shang)年同(tong)期相(xiang)比(bi)，東南(nan)部(bu)略偏多(duo)，其余(yu)大(da)部(bu)地(di)(di)(di)區偏多(duo)2-3成(cheng)。氣候條件(jian)對(dui)(dui)稻(dao)(dao)(dao)瘟病(bing)的(de)發(fa)(fa)生流行較為(wei)有(you)利。雖然(ran)我市(shi)(shi)水(shui)稻(dao)(dao)(dao)品種的(de)抗(kang)性近年有(you)所(suo)提升(sheng)(sheng)，但稻(dao)(dao)(dao)瘟病(bing)菌優勢種群突(tu)出、致病(bing)譜廣、致病(bing)性強，各(ge)地(di)(di)(di)要(yao)高度重視，積(ji)極開展(zhan)稻(dao)(dao)(dao)瘟病(bing)的(de)系統調查(cha)和(he)大(da)田普查(cha)，及時發(fa)(fa)布稻(dao)(dao)(dao)瘟病(bing)發(fa)(fa)生防(fang)治信息，要(yao)抓(zhua)住關鍵時期，組織對(dui)(dui)路藥劑，積(ji)極動員廣大(da)群眾開展(zhan)稻(dao)(dao)(dao)瘟病(bing)的(de)防(fang)治工作，最大(da)限度地(di)(di)(di)減少稻(dao)(dao)(dao)瘟病(bing)造成(cheng)的(de)損失(shi)。防(fang)治藥劑推薦：畝用枯(ku)草芽孢(bao)桿菌1000億(yi)活芽孢(bao)/克(ke)可(ke)濕性粉劑20-30克(ke)或(huo)2%春雷霉素水(shui)劑100-150克(ke)或(huo)250克(ke)/升(sheng)(sheng)嘧菌酯30-40毫(hao)升(sheng)(sheng)或(huo)75%三環唑水(shui)分散粒(li)劑20-30克(ke)或(huo)25%咪鮮(xian)胺微乳劑60-100克(ke)。
