Prevention methods Agricultural measures: Strengthen fertility and increase tree vigor; avoid excessive humidity in the shed. Clear field strains: Strengthen disease investigation and monitoring. Once diseased leaves occur in the field, they should be removed in time and burned in a concentrated manner to reduce the source of the disease. During the growth period of pupa, especially in the spring, summer and autumn, the shoots can be pumped to the growing stage three times. The following chemicals can be used to control: 50% carbendazim WP 800 to 1000 times; 70% thiophanate-methyl WP 800~1000 Diluent; 75% chlorothalonil WP 500 to 800 times; 77% copper hydroxide wettable powder 600~800 times; 50% Iprodione wettable powder 1000~1500 times liquid; 50% procymidone Wettable powder 600 times liquid; The diseased variety orchard, which was heavier in last year, can be used 2 times in the spring, summer and autumn shoots, and once in 10-15 days. The spray should be uniform, the droplets should be fine, and the sprayer should be sprayed from under the canopy to ensure the quality of the spray. Ear Speculum,Reusable Ear Speculum factory, offer high-quality Disposable Ear Speculum,Medical Ear Speculum for you to choose. Ear Speculum,Reusable Ear Speculum,Disposable Ear Speculum,Medical Ear Speculum Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com
How to prevent gray spot disease
Disease symptoms The pathogen can damage the leaves, branches and fruits. There are two types of lesions on the leaves, acute and slow. The acute type forms large patches on the leaves, or the leaves are scorching and a large number of fallen leaves. In the early stages of the slow lesions, the leaves produced pale brown dots, which were later joined together into irregular large spots with narrow black bands on the edges and gray or yellow-yellow centers with scattered black dots.