Fusarium wilt is caused by the infection of Fusarium in the fungus. Invasion of the plant roots from the underground wounds causes the plants to wither and die. The leaves begin to appear yellow and fall off from the top of the diseased branches. Generally, they begin to develop from individual branches, and then gradually develop until the entire plexus dies. From June to July, the onset was heavier.
Prevention methods Strengthen the management of conservation and improve the resistance of plants. The dead branches and diseased plants were promptly cut off, concentrated and burned, and disinfected with 3% ferrous sulfate. After infection, 50% of methadone WP or 200 % of 50% carbendazim WP may be used to irrigate the roots.
The keratoses are fungal diseases, and the pathogens are Cercospora and Cocaria. Mostly from the lower leaves of the first disease, gradually spread upward to expand. Poor growth of plants, heavy rainy season, lesions were polygonal, yellow-brown to dark reddish-brown. In severe cases, the leaves are covered with lesions, often connected into pieces, causing the leaves to fall off. Generally, a large number of lesions appeared in July and fall in August. In September, the leaves of the lower branches all fell off.
Prevention and control methods Autumn leaves are cleared away in autumn and winter, concentrated burning, reducing the source of infection. After the leaf is sprayed, it is sprayed with 1:1:100 Bordeaux fluid for 1 time; when it is infected, 50% carbendazim WP can be sprayed 700 to 1000 times, or 70% Mancozeb WP can be 800 times, or 65%. 300 times more than the zinc. Spraying 10 times a day, even spraying 3 to 4 times, the control effect is better.
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