辣(la)椒(jiao)細(xi)菌(jun)性斑(ban)點病(bing)(bing)(bing)(bing)多在成(cheng)(cheng)株期發(fa)生,主要危害(hai)葉片(pian)(pian)、莖、果實也可受害(hai)。葉片(pian)(pian)發(fa)病(bing)(bing)(bing)(bing),初時出現水浸狀、黃綠色小斑(ban)點,逐(zhu)漸擴大(da)成(cheng)(cheng)大(da)小不(bu)等的圓形或(huo)不(bu)規則(ze)形病(bing)(bing)(bing)(bing)斑(ban)。病(bing)(bing)(bing)(bing)斑(ban)邊(bian)緣(yuan)(yuan)褐(he)色,稍隆起,中部淺褐(he)色,稍凹陷,表面粗糙。病(bing)(bing)(bing)(bing)斑(ban)多時可融合(he)成(cheng)(cheng)較大(da)病(bing)(bing)(bing)(bing)斑(ban)或(huo)病(bing)(bing)(bing)(bing)斑(ban)連片(pian)(pian),引起葉片(pian)(pian)脫落。重病(bing)(bing)(bing)(bing)株葉片(pian)(pian)幾(ji)乎落光,僅剩枝梢(shao)幾(ji)片(pian)(pian)小葉,對(dui)產量(liang)影響很大(da)。莖部發(fa)病(bing)(bing)(bing)(bing),病(bing)(bing)(bing)(bing)斑(ban)呈不(bu)規則(ze)條斑(ban)或(huo)斑(ban)塊,后木栓化,或(huo)縱裂為瘡痂狀。果實發(fa)病(bing)(bing)(bing)(bing),出現圓形或(huo)不(bu)規則(ze)疤疹狀黑褐(he)色病(bing)(bing)(bing)(bing)斑(ban)。后病(bing)(bing)(bing)(bing)斑(ban)瘡痂狀,邊(bian)緣(yuan)(yuan)有裂口,并有水浸狀暈環,濕度大(da)時有少(shao)許菌(jun)膿(nong)溢出。
防治(zhi)方法:80%代森錳鋅可濕(shi)(shi)性(xing)粉(fen)劑500倍液;72%農用硫酸鏈霉素可濕(shi)(shi)性(xing)粉(fen)劑4000倍液;或1:1:200波爾多液7-10天一次,連續3-4次。













