(1) Selection of disease-resistant varieties: There is a significant difference in resistance between the varieties to this disease. At present, the commonly used disease-resistant varieties are Zhongdan No.2, Zhongdan No.14, Zhongdan No.12, Liaodan No.18, Danyu No.13, Shandan No.9, Yuyu No.2, and Yuyu No.11.

(2) Implement crop rotation and deep plowing: continuous cropping for many years will make the amount of bacteria in the soil increase, and the incidence will be heavy. Implementation of rotation for more than three years basically eliminates the damage caused by diseases in the soil. In addition, the soil is deeply turned and the spores of the pathogen are overwhelmed by the sowing layer, and the source of the bacteria is reduced to reduce the incidence.

(3) Pull out the diseased plant early: Pull out the diseased plant before the white film of the disease panicle does not break, and take the diseased plant out of the ground to deep-buried or burnt to prevent the bacteria from falling into the soil.

(4) Chemical control: This disease is a one-time infestation disease at the seedling stage. The use of chemicals to prevent the invasion of pathogens during the seedling stage will effectively control the occurrence of this disease.

First, with 25% triadimefon or oxytetrazin, 0.3% dose of seed dressing, the control effect of up to 90%. Corn paste can also be used as an adhesive to increase efficacy.

Secondly, 70% pentachloronitrobenzene is used to make medicine soil with a dose of no more than 0.7%, and the seed-covering effect is better when sowing.

Third, use seed dressings to prevent disease. At present, there are a variety of seed coating agents that can effectively control pests and diseases. According to the Institute of Agricultural Sciences in Siping City, Jilin Province, the treatment of corn smut was 63.3% to 87.3% after corn seed coating.

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