How to prevent and cure Chinese herbal medicine Huangjing leaf spot? Huang Jing can also be called dragon title, white and rabbit, bamboo, chicken, chicken, rice bran, and bamboo. It is one of the important Chinese herbal medicines in China. However, in the process of planting Huangjing, due to various diseases, it is a serious threat to the healthy growth. Compared with the yellow leaf spot disease that is said to be in the small series today, it will cause the death of the Huangjing plant in severe cases. How can we effectively prevent the yellow leaf What about spot disease?
First, the symptoms of Chinese medicine Huangjing leaf spot disease
1. The initial stage of the disease begins with the leaves at the base of the stem. The leaves appear brown spots, the middle is light white, the edges are brown, and there is obvious yellow haze on the healthy tissue. When the condition is serious, multiple lesions heal cause the leaves to die, and they will gradually spread upwards. Finally, the whole plant leaves die and fall off.
2, the pathogen of Huangjing leaf spot is a kind of Alternaria, which usually occurs in summer and autumn, and the incidence is more serious in the rainy season. From June to July, it is a season with a lot of rainfall. The incidence is serious. At the beginning of the plant, there will be lesions and gradually move up. By the end of July, the disease has become more serious, and the whole plant has died. In the August-September period, the plant in the field died due to various other reasons, and the incidence reached its peak. The number of infected plants will decrease in October-November. It can be seen that high temperature and high humidity are the main causes of leaf spot disease.
Second, the symptoms and prevention methods of traditional Chinese medicine Huangjing leaf spot
1. Agricultural control: After the yellow saplings are poured into the winter, the dead branches of the aboveground parts of the plants should be removed in time, and these dead branches should be brought out of the field for burning or burial to eliminate the source of wintering.
2, chemical control: before the rainy season, before the onset of the yellow spot leaf spot disease and the initial stage of the injection of 10% difenoconazole water dispersion granules 1500 times solution, or 50% carbendazim WP 1000 times solution, every Spray once every 7-10 days, spray 3-4 times continuously; spray 50% thiophanate-methyl WP 600 times solution, or 40% chlorothalonil suspension 500 times solution, 25% benomyl , cyclohexyl zinc emulsifiable concentrate 800 times solution, 50% thiophanate-methyl, sulfur suspension agent 800 times solution, 50% yield WP 1000 times solution, I usually spray once every 5-7 days, continuous spraying Apply 3-4 times.
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