症狀：siguashuangmeibingzhuyaoweihaiyepian。fabingchuqizaiyepianzhengmianchuxianbuguizedehelvhuangseban，zhujiankuozhanchengduojiaoxinghuanghesebingban
，shidudashibingbanbeimianchangchuhuiheisemeiceng，houqibingbanlianpian，zhengyekusi。jinqibushaocaiqusiguashengchanshoushuangmeibingweihaiyanzhong，zaochengbingbanleilei，guayeganku，zhizhuzaoshuai
，guatiaowanqu、瘦小、老化，產量和質量顯著下降。 

    防治方法：防(fang)治(zhi)絲(si)瓜(gua)霜(shuang)黴(mei)病(bing)要(yao)選(xuan)用(yong)抗(kang)病(bing)優(you)良(liang)品(pin)種(zhong)，用(yong)營(ying)養(yang)缽(bo)集(ji)中(zhong)育(yu)好(hao)壯(zhuang)苗(miao)，整(zheng)畦(qi)使(shi)排(pai)水(shui)良(liang)好(hao)，施(shi)足(zu)基(ji)肥(fei)，注(zhu)意(yi)引(yin)蔓(man)整(zheng)枝(zhi)，保(bao)證(zheng)株(zhu)間(jian)通(tong)風(feng)透(tou)氣(qi)
，更(geng)重(zhong)要(yao)的(de)是(shi)噴(pen)藥(yao)要(yao)及(ji)時(shi)、對症下藥。在發病前和發病初期，選用保護性藥劑

，如75%達霜寧600-800倍液，百菌清或百可寧（40%懸浮劑）500-700倍液；發病期應噴灑治療（兼保護）性藥劑，如殺毒霜淨（64%可濕性粉劑）600-800倍液，霜盡（55%可濕性粉劑）或霜露速淨*72%可濕性粉劑）800-1000倍液。每隔7-10天噴1次，視病情連噴3-5次，注意葉麵和葉背都均勻噴濕。