霜(shuang)黴(mei)病(bing)和(he)葉(ye)黴(mei)病(bing)是(shi)菠(bo)菜(cai)上(shang)最(zui)常(chang)發(fa)的(de)病(bing)害(hai)，濕(shi)度(du)過(guo)大(da)有(you)利(li)於(yu)這(zhe)兩(liang)種(zhong)病(bing)害(hai)發(fa)生(sheng)。霜(shuang)黴(mei)病(bing)一(yi)般(ban)先(xian)從(cong)下(xia)部(bu)葉(ye)片(pian)開(kai)始(shi)發(fa)病(bing)
，發(fa)病(bing)初(chu)期(qi)產(chan)生(sheng)淡(dan)綠(lv)色(se)水(shui)漬(zi)狀(zhuang)小(xiao)點(dian)
，病(bing)斑(ban)邊(bian)緣(yuan)不(bu)明(ming)顯(xian)
，後(hou)期(qi)發(fa)展(zhan)為(wei)黃(huang)色(se)不(bu)規(gui)則(ze)病(bing)斑(ban)，濕(shi)度(du)大(da)時(shi)葉(ye)背(bei)產(chan)生(sheng)灰(hui)白(bai)色(se)黴(mei)層(ceng)，逐(zhu)漸(jian)變(bian)為(wei)深(shen)灰(hui)色(se)。棚室內幹旱時病葉逐漸變黃
、幹gan枯ku
，空kong氣qi濕shi度du大da時shi發fa病bing葉ye片pian黴mei爛lan。葉ye黴mei病bing發fa病bing初chu期qi葉ye片pian出chu現xian淺qian黃huang色se邊bian緣yuan不bu明ming顯xian且qie不bu規gui則ze的de病bing斑ban，後hou期qi顏yan色se變bian深shen，濕shi度du較jiao大da時shi葉ye背bei長chang出chu灰hui色se至zhi褐he色se黴mei層ceng，病bing葉ye逐zhu步bu卷juan曲qu枯ku死si。

防fang治zhi霜shuang黴mei病bing和he葉ye黴mei病bing
，通tong風feng排pai濕shi是shi關guan鍵jian，特te別bie是shi在zai澆jiao水shui以yi後hou要yao拉la大da放fang風feng口kou，對dui快kuai收shou獲huo的de菠bo菜cai，晚wan上shang隻zhi要yao溫wen度du不bu是shi太tai低di就jiu可ke以yi開kai放fang通tong風feng口kou過guo夜ye。發fa病bing較jiao輕qing的de田tian塊kuai可ke以yi人ren工gong摘zhai除chu病bing葉ye，防fang止zhi病bing菌jun隨sui流liu水shui等deng傳chuan播bo。藥yao劑ji防fang治zhi霜shuang黴mei病bing，可ke以yi在zai發fa病bing初chu期qi用yong75％百菌清可濕性粉劑500倍液噴霧，發病較重時用58％甲霜·錳鋅可濕性粉劑500倍液，或70％乙鋁·錳鋅可濕性粉劑500倍液

，或69％烯酰·錳鋅可濕性粉劑800倍液噴霧。防治葉黴病，可以用10％多抗黴素可濕性粉劑750倍液等噴霧，交替用藥，每5～7天一次，連續防治2～3次。