一、症状特点2月底3月初,西甜瓜进入座瓜期至膨大期的植株易发 生。晴日上午9～10时至下午3～4时, 叶片呈萎蔫状态,其它时间正常。往往成 片或整个温室所有植株全部发病。萎蔫 植株很少死亡,个别经7～10天可恢复正 常生长,大部分持续很长时间,直至瓜成 熟。刨开根部土壤,可见患病植株根系外 缘的须根黑褐色坏死。萎蔫症与枯萎病 First, the characteristics of symptoms early March early March, melon into the seat melon to the swelling of the plant prone to occur. Sunny 9 am to 10 pm to 3 pm to 4 pm, the leaves were wilting state, other times normal. Often into the film or all the plants in the greenhouse disease. Few wilting plants die, individually after 7 to 10 days to resume normal growth, most of the continued a long time until melons mature. Unplug the roots of the soil, showing diseased roots of the fibrous roots of dark brown necrosis. Wilt disease and wilt disease