Maize big spot disease is an important disease on corn in China, and it is more serious. Diseases mainly occurred after tasseling in the corn. The lower leaves first developed and quickly expanded to the upper leaves, resulting in a large number of lesions on the leaves, affecting plant photosynthesis, resulting in inadequate grain filling, resulting in reduced yield. In the general vintage, the disease caused by large patch disease was reduced by 5%. In the year of serious disease, the loss of susceptible varieties was as high as 20%. The germs mainly invade corn leaves and leaf sheaths, but they also occur on temporal lobes. It usually begins with the lower leaves of the plants and gradually spreads to the upper leaves. On the leaves, water-stained spots initially appeared, and later gradually expanded to form long spindle-shaped lesions parallel to the veins. The lesions are yellowish-brown or gray-grey in the center, brown on the edges, and black moldy layer on the upper part. In severe cases, the lesions form a large stripe, and the size is generally 50-1005-10 mm, and some lesions are as long as 200 mm. When a large number of lesions form on the leaves, the leaves and even the whole plant turn yellow prematurely. The chlorotic spots often appear on some resistant corn materials. Some spots have necrosis in the center, but they develop slowly with little or no mold layer. Control methods: Before and after corn picking, the disease rate in the field reached more than 70%. When the diseased leaf rate was 20%, spraying was started. Anti-effective agents are: 80% A carbendazim wettable powder 30g / sprayer water, 80% new manganese 40g / sprayer water, 70% thiophanate-methyl 35g / sprayer water, evenly spray. 2-3 sprayers per acre spray liquid, spraying once every 7-10 days, a total of 2 times. Baby Hair Clippers,Hair Trimmer,Hair Cutting NINGBO YOUHE MOTHER&BABY PRODUCTS CO.,LTD , https://www.oembreastpump.com