Corn southern leaf blight dataset

Corn small spot disease, also known as spot disease. Maize Leaf Spot is one of the most important diseases in maize producing areas in China. It is common and serious in warm and humid areas of the Yellow River and Yangtze River valleys. The occurrence of summer maize was serious in Huaibei area of Anhui province. Generally, it results in a 15-20% reduction in output, a serious reduction of more than 50%, or even no harvest. The main symptoms were maize leaves and 3 kinds of lesions. First, oval or nearly rectangular lesions restricted by veins are yellowish-brown with dark brown margins; second, gray-brown oval lesions unrestricted by veins. Thirdly, it is small yellow-brown necrotic spots. Most of the lesions are linked together, causing the death of the leaves. [Control methods]. [Seed treatment] Seed coating agent is a kind of compound seed treatment agent made of pesticides, fungicides, compound fertilizers, trace elements, plant growth regulators, slow-release agents and film-forming agents. It has the functions of preventing seed-borne bacteria and seedling diseases. Seed-borne bacteria is one of the primary infection sources of maize leaf spot. Seed coating technology can effectively reduce the primary infection sources of maize leaf spot and control the occurrence of leaf spot. [Agricultural control] Fall ploughing should be carried out in diseased fields so that the residues of diseased plants can be buried below 10 centimeters underground; the residues of diseased plants on the ground should be removed and the fungus-carrying residues should be fully matured, and it is better not to make corn seed fields. Large-scale rotation was carried out in the disease-producing plots to minimize the pathogen base and reduce the source of primary infection. Sow in time and avoid rainy weather at heading stage. Applying plantar fertilizer in proper period and proper amount of topdressing can ensure the nutritional supply of mother parent for the whole period and promote the growth of plants, especially from jointing to flowering. At the bottom, the diseased leaves are cleaned up centrally, and the outdoor treatment can reduce the field bacterial quantity and change the field microclimate, thus reducing the degree of disease. [Pharmaceutical control] On the basis of agricultural control and seed coating, 50 grams of 50% Haosujing wettable powder or 60 grams of 80% Suosujing wettable powder are used every 667 square meters, and sprayed three times. It can also be sprayed in the early stage of the disease. The commonly used medicines can be used as 75% chlorothalonil wettable powder 800 times liquid, 70% methyl toprazine wettable powder 600 times liquid, once every 7-10 days, twice or even twice.