症狀：日ri灼zhuo病bing主zhu要yao發fa生sheng在zai茄qie果guo類lei蔬shu菜cai的de葉ye片pian上shang
，特te別bie是shi外wai周zhou與yu頂ding層ceng葉ye片pian和he茄qie科ke果guo實shi上shang。葉ye片pian受shou害hai，初chu始shi葉ye片pian褪tui綠lv，葉ye片pian上shang形xing成cheng不bu規gui則ze斑ban塊kuai或huo葉ye片pian呈cheng漂piao白bai狀zhuang，嚴yan重zhong的de半ban葉ye及ji整zheng個ge葉ye片pian永yong久jiu性xing萎wei蔫nian或huo幹gan枯ku，失shi去qu同tong化hua功gong能neng，果guo實shi受shou害hai，主zhu要yao發fa生sheng在zai果guo實shi向xiang陽yang麵mian上shang，初chu期qi被bei太tai陽yang曬shai成cheng灰hui白bai色se或huo淺qian白bai色se革ge質zhi狀zhuang
，病bing部bu表biao麵mian變bian薄bo
、皺縮
，組織壞死變硬，如同開水燙了一樣，若空氣濕度大，受腐生菌浸染，長出灰黑色墨層，使病部腐爛。

原因：當白天溫度升高到35℃以上或夜間溫度高於20℃以上且時間超過4天tian
，很hen容rong易yi發fa生sheng日ri灼zhuo現xian象xiang。另ling外wai，棚peng室shi內nei土tu壤rang缺que水shui，放fang風feng不bu及ji時shi也ye容rong易yi發fa生sheng日ri灼zhuo病bing。蔬shu菜cai葉ye片pian濕shi度du大da，如ru早zao晨chen果guo實shi上shang出chu現xian露lu水shui珠zhu


，在zai陽yang光guang的de照zhao射she下xia，露lu珠zhu聚ju光guang吸xi熱re
，也ye容rong易yi發fa生sheng日ri灼zhuo；有時在果實膨大時，缺乏中微量元素也會導致果皮耐光性下降，發生日灼。

防止措施：yishizaigaowenjijie，yingcaiyongzheyangwangfugai，jiangdipengneiwendujibikaitaiyangguangzhijiezhaoshe，pengshineijishifangfengjiangwen，yudaopengshineiwenduguogaoyingshidangguangai，buchongturangshuifen，fangzhizhizhutiwenshenggao，guoshishishuifashengrizhuo。haiyaozhuyihelimizhi，shijingyehuxiangzheyan，bimianguoshishouyangguangzhijiezhaoshe。faxianbingguohou，yaojishizhaichu。shengchangguochengzhongyingjishibuchongzhongweiliangyuansu，tigaozuowukangninengli。zaigaowenjijiepenshi6000倍液天然芸苔素——碩豐481，對預防和治療日灼病有一定的效果。