炭tan疽ju病bing病bing斑ban開kai始shi於yu葉ye尖jian或huo葉ye緣yuan,褐he色se,斑ban麵mian現xian明ming顯xian或huo不bu明ming顯xian的de輪lun紋wen,其qi病bing葉ye上shang形xing成cheng有you散san生sheng或huo排pai列lie規gui則ze的de小xiao黑hei點dian。病bing原yuan為wei半ban知zhi菌jun亞ya門men真zhen菌jun,稱cheng虎hu尾wei蘭lan刺ci盤pan孢bao菌jun。南nan方fang高gao溫wen的de天tian氣qi蔭yin濕shi條tiao件jian下xia有you利li發fa病bing,尤you其qi4~6月發病較嚴重。
防病方法:冬春季剪除病部葉片及枯病葉,增施磷鉀肥,發病初期及時噴施50%炭疽福美可濕性粉劑800倍液,或75%的百菌清+70%托布津可濕性粉劑(1∶1)1000倍液。
鐮孢斑點病 又稱葉斑病,最先在葉片發現圓形病斑,直徑可擴大到12haomi。shaoxiaxian,qianhonghese,youdanhuangsebianyuan。bingbansansheng,bianjiquanye,banzhongyanggankutuoluo,xingchengchuankong。jigebingbanxianghuronghe,huangeyepian,zebingbuyishangkusi。bingyuanweibanzhijunyamenqiukemuzhenjun。gaowenduoyujijieyifabing。
防治方法:降低土壤濕度。發病初期,可選用波爾多液、53.8%可殺得2000幹懸浮劑1000倍液或47%加瑞農可濕性粉劑700倍液,連噴2~3次,每隔5~7天噴一次。
細菌性軟腐病 ranbinghouyepianyoulvsebianweiqianhuangsezhihuihuangse,jindimiandejingjibuchuxianshuijinzhuangruanfubing,houqishouhaibingyeyidaozhe。genjingburanbing,chengcaohuangseruanfu,genbufulankusi。genxishoushuijinyichengheifuzhuangkusi。tebiechun、夏季高溫多雨、台風大雨天氣發病較為嚴重。病原是由細菌引起的。
防治方法:冬、春季應保持10℃以上,控製澆水,盛夏高溫天氣應稍遮陰。春、qiushengchangqiwang,yingzengshilinjiafei,tigaokangbingnengli。zuihaoxuanzewubingtuhuohuoshaotuhuojingrelimiejunhouzaizhongzhi。faxianbingyeyingjishijianchushaohui。fabingchuqi,kexuanyongyiyongliusuanlianmeisu2000倍液、47%加瑞農可濕性粉劑700倍液或30%綠得懸浮劑500倍液,每隔5~7天噴一次,連噴2~3次防治。
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