论文部分内容阅读
水空心菜产生黄色斑点可能是叶斑病,主要为害叶片,其次是叶柄和茎蔓。初发病叶面长黄色至黄褐色病斑,边缘不太明显,病斑受叶面限制成圆形或不规则形,后期病斑颜色渐深,四周具黄色晕圈。有的表面破裂,后全叶枯死。湿度大时,病斑表面可见浅灰色霉层。防治方法:发病初期喷施30%绿得保400倍液,60%琥胶肥酸铜
Water spinach produce yellow spots may be leaf spot disease, the main damage leaves, followed by petiole and stem vine. Initial incidence of yellow leaves long yellow to brown lesions, the edge is not obvious, the lesion is limited by the leaves into a circular or irregular shape, the lesion color gradually deeper, surrounded by a yellow halo. Some surface rupture, after the whole leaf died. When the humidity is high, the lesion surface shows a light gray moldy layer. Prevention and treatment methods: the early onset of spraying green 30% Paul 400 times, 60% sodium gluconate