According to the observation, the yellowing of the whole leaf of the plant is due to the insufficient application of organic fertilizer in the soil, especially the basic fertilizer, the growth of the plant declines, and the leaves age early. Observed from the lesions on the leaves, anthracnose appeared. Because the anthracnose bacteria are already in the young stage of the leaf, they sneak into the leaf through the gap of the edge of the leaf, and when the plant grows weak, it will show from the edge of the leaf.
If the plant is in the middle or late period of growth, that is, it is coming to the shed, then the application of organic fertilizer and available nitrogen fertilizer is of little significance, and can only do good work in the future: if the organic fertilizer is applied before planting, pay attention to top dressing when flowering, every Collect 1 ~ 2 times of melon spray and 1 time of high-quality foliar fertilizer to meet the nutrient consumption of plants during the melon sitting period. Before flowering, anthrax must be prevented in advance. The fungicide can be used as 800 times liquid of 70% thiophanate-methyl wettable powder, or 1000 times liquid of 25% Qingfeng imiexamine emulsifiable concentrate, or 1000 times liquid of 10% difenoconazole water dispersant. Spray once every 10 days, 2-3 times in a row.
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