zaishandongshengqingzhoushigaoliuzhencaifangshi,bushaozhongzhixihuludecainongxiangjizhefanying,jinqixihululanganxianxiangyanzhong,youdeshenzhizaochengxihulusike。namenaxiebinghainenggoudaozhixihuluchuxianlanganxianxiang,cainongyougairuhefangzhine?
能夠引起西葫蘆發生爛稈的主要有兩種病害:
第(di)一(yi)是(shi)蔓(man)枯(ku)病(bing)。這(zhe)種(zhong)病(bing)害(hai)主(zhu)要(yao)是(shi)從(cong)西(xi)葫(hu)蘆(lu)的(de)莖(jing)節(jie)處(chu)染(ran)病(bing),染(ran)病(bing)部(bu)位(wei)初(chu)呈(cheng)暗(an)褐(he)色(se),後(hou)逐(zhu)漸(jian)變(bian)為(wei)黑(hei)色(se),且(qie)病(bing)斑(ban)處(chu)易(yi)裂(lie)口(kou),流(liu)出(chu)白(bai)色(se)膠(jiao)狀(zhuang)物(wu),後(hou)期(qi)病(bing)莖(jing)幹(gan)縮(suo),縱(zong)裂(lie)似(si)亂(luan)麻(ma)狀(zhuang)。
diershiruanfubing。xihuluderuanfubingduocongxihuludegenjingbukaishiranbing,jingganxianbiaoxianweishuijinzhuang,zhujianbianruan,qiebingbuaoxian,neibuzuzhifulan,xingchenghuihesenianchouzhuangwu,juyouechouwei。
針對於這兩種病害造成的西葫蘆爛稈,菜農要注意做好以下幾點:
shouxianyaobimianpengneichuxiangaowengaoshi。yanjiubiaoming,xihuludemankubingjixijunxingruanfubingzaigaowengaoshidehuanjingzhongfabingyanzhong。yinci,pengshiguanlizhongyingzhuyijiaqiangtongfengjiangwen,jiangpengneibaitianwendukongzhizai23℃左右為宜,如果棚內溫度高於25℃,一定要注意通風降溫;在晚上時棚內溫度則要控製在13℃左右為宜。
其次保護好植株傷口。菜農在疏葉、zhaiguajidachahourongyizaochengshangkou,bingjunrongyicongzhexiebuweiqinran,cainongchubimianzaiyutianhegangjiaoguoshuihoupengneishidudashicaozuo,yibaozhengzhizhudeshangkouyouzugoudeyuheshijianwai,haiyaozhuyidayeliubing,bingshiyongDT等銅製劑塗抹傷口。
再次,菜農要注意使用藥物預防。當西葫蘆植株發生蔓枯病時,菜農可使用25%的咪鮮胺1500倍液,或阿米妙收1000倍液防治;而對於細菌性軟腐病,菜農可用農用鏈黴素1500倍液和DT500倍液防治,每隔5至7天噴灑1次,連續噴灑2至3次後,可起到良好的防治效果。
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