What medicine should I take when garlic leaves are yellow?

In the growing season, in areas with serious diseases, spraying 1 time every 10 day from the early onset of the disease in late June to 10 month can effectively control the disease. Commonly used chemicals are Bordeaux mixture 1: 1: 100 times;

And 50% of Tobezin, 500-? 800 times solution, 1000 times 50% carbendazim wettable powder (or 600-800 times 40% colloidal suspension), 1000- 15? 00 times liquid, 65% zineb 500 times liquid, etc. , can be selected or used alternately.

Leaf blight overwinters on diseased leaves, and when the temperature is suitable in the following year, the spores of the pathogen spread to host plants through wind and rain. The disease can occur in July-10. The lower leaves of plants are very ill. High temperature, high humidity and poor ventilation are conducive to the occurrence of diseases. Diseases with weak growth potential are more serious.

Extended data:

Garlic leaf blight is a fungal disease, which is widespread in the main garlic producing areas and has become an important disease that harms garlic. After the solar term, it often rains and the air is humid, which is just suitable for garlic leaf blight.

Garlic leaves are infected with bacterial leaf blight. At first, there were some green dots and white ones. With the severity of leaf infection, the small white spots expand into irregular lesions, which are grayish brown or grayish white. The air is humid and covered with black pathogen spores, which can spread with the wind and rain.

When the damage is serious, the output of garlic and garlic moss decreases, and garlic grows less. Through the comparison of field planting in recent years, it is found that in the continuous cropping land, the amount of chemical fertilizer and nitrogen fertilizer is too much in the field where organic fertilizer is not used for a long time.