一、黄瓜黑星病为什么传播那么快?如何防治?主要是种子可以带菌,不仅种子外部可以带菌,而且种子内部也可以带菌。由于调整频繁,又未进行种子消毒,因此,病菌随着调种而迅速蔓延。黄瓜黑星病可危害叶片、茎部、卷须、生长点、瓜条等。幼苗被害,子叶上 First, cucumber scab Why spread so fast? How to prevent? The main seeds can carry bacteria, not only can carry the seeds of the outside, but the seeds can also carry the bacteria. Due to frequent adjustments and no seed disinfection, the germs spread rapidly as they were planted. Cucumber scab can be harmful to leaves, stems, tendrils, growth points, melon and so on. Seedlings were killed, cotyledons