Wheat smut has been seriously affected in southern Jiangsu and other places in recent years, and the yield and quality of wheat in some seriously ill fields have been seriously affected. The commercial wheat produced has not been rejected due to the high disease rate.
In recent years, common smut disease has occurred in southern Jiangsu and other places, and some fields have serious diseases, which have serious impact on wheat yield and quality. In the coastal areas along the Huaihe River, smut has occurred all year round, and smut has also occurred in some areas. Scattered smut has a long distance in the panicle, and the wheat seeds produced in the ward are more likely to be ill. The red-skinned wheat seeds produced in the Huainan wheat area should be noted whether they have smut. In the process of wheat multiplication, large seed enterprises such as Dahua Seed Industry attach great importance to the use of seed treatment and other measures to control the diseases transmitted by smut and the risk of seed disease is relatively small.
Retaining seeds in diseased fields and switching to new wheat varieties can reduce the risk of seed-borne diseases, but unless seeds produced in non-ward areas are used, the possibility of seed-borne bacteria cannot be ruled out. In addition, smut disease can survive in soil scum and infect wheat seedlings. It is best to use seeds for seed treatment. Syngenta's 25g/L of bacteriocin suspension coating agent is registered for wheat seed coating to control smut and root rot, 2.5 to 5 grams and 3.75 to 5 grams per 100 kg of seeds. . 4% sclerotium and thiazolone suspension seed coating agent of Shaanxi Xida Huate Technology Industrial Co., Ltd., containing 1.7% of fludioxonil and 2.3% of thiazolone, registered for wheat seed coating to control smut and root Rot, 4 to 7 grams and 5 to 7 grams of pure drug per 100 kilograms of seeds. BASF's 25 g/L sterilized azole suspension seed coating is registered for wheat seed dressing to control smut and smut, and 2.5 to 5 grams of pure drug per 100 kg of seed.
In addition to fludamycin, xylobacter, thiazolone, sterilized azole and other drugs, tebuconazole, difenoconazole and other drugs can also effectively control wheat smut. Oxazole fungicides such as tebuconazole have certain inhibitory effects on seed germination and shoot growth. When the wheat emergence period may encounter low temperature and high humidity environment, try to avoid using these drugs. .
The smut pathogen is infested at the seedling stage. After the emergence of wheat, the bacteria have invaded the wheat seedlings. At this time, there is basically no control effect when spraying pesticides. Seed treatment should be carried out, which not only has good control effect, but also saves medication and is easy to operate. It is treated with a seed coating agent with high quality and quality by a large company such as Syngenta. The operation is relatively simple, and the coating quality and disease control effect are good. After the seeds are coated, they can be aired properly and stored for a period of time, which makes it easier for large farmers to carry out seed treatment and sowing operations.
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(Source: Pesticide Newsletter)
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