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西瓜不同病害,在叶片上往往具有不同的表现。根据西瓜叶片病变症状诊断,采取相应的治疗措施,可把病害迅速扑灭于大发生之前,确保西瓜丰收。 一、萎蔫叶 叶片在中午气温较高时,从下部开始似失水状凋萎,傍晚逐渐恢复,次日中午又表现蔫萎,并渐次向上部叶片发展,多为枯萎病。宜采取:1喷洒0.3％磷酸二氢钾,增强植株长势,提高抗病力;2严格控制灌水,避免病区的水流入无病区,防
Different diseases of watermelon, leaves often have different performance. According to the diagnosis of watermelon leaf lesions, to take appropriate treatment measures, the disease can be quickly extinguished before the big occurred, to ensure that the watermelon harvest. First, the leaves of wilting leaves at high temperatures at noon, starting from the bottom began to wilt wilt, gradually restored in the evening, again the next day show wilt, and gradually to the upper leaves, mostly Fusarium wilt. Should take: 1 spraying 0.3% potassium dihydrogen phosphate to enhance plant growth, improve disease resistance; 2 strict control of irrigation, to avoid ward inflow water into the disease-free zone, anti