Recently, many peach producing areas have peach mildew spot perforation disease. The disease is one of the fungal perforation diseases of peach trees, also known as peach brown perforation disease, in which the pathogen overwinters in diseased leaves, branches or buds with filaments or conidia. It mainly harms the leaves, flowers and fruits of peach trees.
Leaf damage symptoms: the lesions are pale yellow-green at first and then turn brown, round or irregularly shaped, with a diameter of 2~6 mm. Most of the young leaves are scorched and do not form perforations. When the temperature is high, black mold grows on the back of the lesion, and some of them are formed after falling off. Perforations form in the leaves after the lesions fall off. Fruit damage symptoms: the lesions are small and round, purple at first, gradually brown, red at the edges, and slightly concave in the center.
In order to effectively prevent and control peach mildew spot perforation, the following measures can be taken:
1. Strengthen cultivation management, enhance tree potential, apply reasonable fertilizer, increase organic fertilizer, and avoid partial application of nitrogen fertilizer. For peach orchards with high groundwater levels or heavy soil clay, it is necessary to improve the soil and drain water in time.
2. For fungal mildew perforation disease, you can use Dasheng 800 times liquid, Luo'an No. 3 800 times liquid, Yingshou 1500 times liquid or 50% carbendazim wettable powder 800 times liquid for prevention and control. Please note that the appropriate agent and concentration should be selected according to the local climatic conditions and the occurrence of the disease, and sprayed according to the specified medication interval. At the same time, it is necessary to pay attention to the alternating use of pesticides to avoid the development of drug resistance by germs.
In addition, the prevention and control of peach mildew perforation disease also needs to pay attention: in the planting process, it is necessary to pay attention to keeping the peach orchard ventilated and light, and reducing humidity to reduce the breeding of pathogens. Regularly inspect the growth of peach trees, and once the symptoms of the disease are found, prevention and control measures should be taken in time to prevent the spread of the disease.
Author: Zheng Ke, Zhongnongle Market Center
Source: Zhongnongle