1. Field diagnosis: The disease mainly damages garlic leaves and garlic sprouts. The lesions were initially immersed in water, followed by white to light gray-brown spots. The lesions developed from the tip of the leaf to the leaf base. After the lesions were enlarged, they were spindle or elliptical. The lesions were elongated in the late stages. The leaves were sparsely gray to gray-brown. The velvety layer was spread from the lower leaves to the upper leaves until the whole plant became infected. Leaf sheaths and even garlic rot, and then dry gray, easy to pull up, the disease Department of gray mold and black hard sclerotia. Garlic botrytis is aggravated in the event of spring rains.
2. The key to prevention and control:
1 selection of disease-resistant varieties.
2 do a good job of water and fertilizer management. Ditch system is suitable for drainage and drainage. After watering, timely cultivating loose soil. Formula fertilization is used to cultivate strong seedlings.
3 chemical control. In the early stage of disease, 50% fasting WP can be used 1500 times, or 50% acetaminophen WP can be sprayed 1000 times. It is sprayed every 7-10 days, depending on the condition, it can spray 2 or 3 times. .
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