MySheen

Characteristics and control methods of gray leaf spot of garlic

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, The main results are as follows: (1) the symptom characteristics mainly harm the leaves. The disease spot is long oval, light brown at first, then gray-white, fine gray-black mildew on both sides of the leaf, and when the disease spot is serious, the disease spot converges, resulting in local death of the leaf. The sun is warm and the night is cool, and the foggy and dewy weather is serious. (2) ① was used to remove the injured leaves in time.

The main results are as follows: (1) the symptom characteristics mainly harm the leaves. The disease spot is long oval, light brown at first, then gray-white, fine gray-black mildew on both sides of the leaf, and when the disease spot is serious, the disease spot converges, resulting in local death of the leaf. The sun is warm and the night is cool, and the foggy and dewy weather is serious. (2) ① was used to remove the injured leaves in time. ② should strengthen field management, reasonable close planting, timely drainage after rain, and improve host disease resistance. At the initial stage of the disease, ③ was sprayed with 75% chlorothalonil wettable powder 1500 times, 50% prohydantoin wettable powder 1500 times, 64% alum wettable powder 500x, 60% ethyl phosphate name wettable powder 500x or 1 ∶ 1 Bordeaux solution, taking turns every 7 to 10 days for 3 times in a row. Pay attention to the harvest and listing after the pesticide interval.

 
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