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南京市六合区新集镇读者来电话说,他家的2.5亩黄瓜蔓2米多长,10天前已开始采收,近期叶片上出现黄色斑点,开始时斑点较小,后扩大并连接成片,严重的致叶缘干枯上卷甚至整张叶发黄枯死。一般基部老叶先发病,逐渐向上发展,瓜蔓上一般没有病症。田间病株率高达100%。前期用丙森锌和百菌清等药防治,几乎没有效果。去年夏秋季田间也有这种病害发生。他问,黄瓜得了什么病,如何防治。当日下午,他专程将黄瓜病株送到了农技001工作室。经检查,送来的黄瓜病叶上布满黄斑,病斑受叶脉限制,叶脉仍呈绿色,部分病斑背面有灰褐色霉状物。
New Town, Luhe District, Nanjing, the reader called to say his family 2.5 acres of cucumber vine 2 meters long, 10 days ago has begun to harvest the recent yellow leaves appear on the leaves, the beginning of a smaller spot, after the expansion and connection into a film , A serious leaf margin dry up or even the entire leaf yellow dead. The general base of the first onset of the disease, and gradually upward development, melon generally no illness. Field strain rate as high as 100%. Early prophylaxis with chlorine and chlorothalonil prophylaxis, almost no effect. This disease happened in the fields of summer and autumn last year. He asked cucumber how he got sick and how to prevent it. On the afternoon of that day, he made a special trip to cucumber diseased plants sent to the studio 001 studios. After inspection, sent cucumber disease leaves covered with yellow spots, lesions by the veins, veins are still green, some spots on the back of a gray-brown moldy.