Euonymus japonicus is easy to infect stem rot. The one-year-old and two-year-old shoots suffer most. In the early stages, the stem turns brown, the leaves are green, the shoots are drooping, the leaves do not fall off, the affected parts of the stems become dark, the cortex shrinks, the endothelium rots, and many tiny black sclerotia are born. As the temperature rises, High, the affected area develops rapidly and the bacteria invade the xylem, causing the death of the whole plant.
Cause of the disease: The pathogen that causes stalk rot in the yellow leaf field is a semi-known fungus, which normally lives in the soil. As the temperature rises, the soil temperature also rises, and the bacteria invade the stems of the seedlings. Especially in high-temperature and low-lying areas, the incidence is more common.
Control methods: (1) Strengthen the maintenance and management of seedlings and increase their own resistance to diseases. (2) Use sufficient farmyard manure as base fertilizer to reduce the incidence of seedlings. (3) Summer seedlings adopt measures such as shade shelters, and large seedlings can be planted ground cover plants or grass cover to destroy the environmental conditions in which the germs occur. (4) Cut off the diseased shoots in time and concentrate them on burning. (5) When the number of diseased seedlings is small, brush 50 times 50% carbendazim solution or 50 times 25% enemy dewetting oil (propoxazole) can be applied to the stem at the early stage of disease. When the amount of diseased seedlings is large or the incidence is high, 800 to 1000 times 25% of the enemy's de-emergent oil or 500 to 600 times 50% of the eubacterial powder is sprayed on seedlings. Both methods are performed once every 7 days for 3 to 4 consecutive times, which can play a preventive and therapeutic role.
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