桃穿孔病常見的有細菌性穿孔病、zhenjunxingmeibanchuankongbingjihebanchuankongbing。jinjiniangediyoujiazhongfazhandequshi,qizhongyixijunxingchuankongbingzuizhong。chuankongbingyinqitaoshudaliangluoye,yanzhongzhedaozhizhishaokusi,chanliangjiangdi,bingyingxianghuayaxingcheng,ciwai,chuankongbinghaiweihaili、杏、櫻桃等多種核果類果樹。
一、為害症狀
1、xijunxingchuankongbing。zhuyaoweihaiyepian,yeweihaiguoshihezhishao,yepianshouhai,chuweishuizizhuangxiaobingban,houfazhanchengshenhese,zhouweiyoudanhuangseyunquandebingban,bianyuanfashengliewen,bingbantuoluohouxingchengchuankonghuoyibufenyuyepianxianglian,bingbanyue2毫米左右。果實受害,病斑深褐色,稍凹陷,邊緣水漬狀,潮濕時,病斑出現菌膿,幹燥時發生裂紋。枝條染病有春、xialiangzhongbingban,chunjikuiyangfashengzaishangnianxiajishengchudezhitiaoshang,bingjunqinruhou,lainianchunjizaizhitiaoshangxingchenganhesexiaopaozhen,kuodahoukezaochengkuzhi。xiajikuiyangduofashengzaixiamodangnianshengxinshaoshang,yipikongweizhongxinxingchenganzisebandian,kuodahoushaoaoxian,yansebianshen,waiyuanshuizizhuang。
2、褐斑穿孔病。為害葉片、枝梢和果實。葉片受害,兩麵均產生圓形或不規則形病斑,邊緣有輪紋,外圍紫色,後期病斑上生出灰褐色黴層,病斑直徑1-4毫米。病斑中部幹枯脫落形成穿孔。新梢和果實受害,病斑與葉片相似,也產生灰褐色黴層。
二、防治方法
1、休眠期減少菌源。冬季結合修剪,徹底清除枯枝落葉及落果,減少越冬菌源;容易積水,樹勢偏旺的果園,要注意排水,修剪時疏除密生枝、下垂枝、拖地枝、改善通風透光條件,降低果園溫濕度;增施有機肥料,避免偏施氮肥,促使樹體生長健壯,提高抗病能力。
2、施藥防治。果樹發芽前,噴施4-5度石硫合劑。5-6月間,噴施75%百菌清可濕性粉劑650倍液1-2次,或3%克菌康可濕性粉劑1000倍液,對穿孔病均有良好效果。對細菌性穿孔病,用農用鏈黴素50-100毫克/升來防治;對真菌性黴斑穿孔病,可用70%甲托可濕性粉1000倍液,或50%多菌靈可濕性粉劑800倍液防治。
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