Autumn sowing is one of the key periods to prevent diseases and insect pests of winter wheat. It can not only control the damage of pests and diseases, but also reduce the source of pests and diseases in winter and reduce the use of chemical pesticides.
Seed treatment
The winter wheat seed coating or chemical dressing treatment before sowing is the main measure to prevent underground pests and prevent winter wheat seed transmission, soil-borne diseases, and powdery mildew, leaf rust, wheat spider and gray planthopper in autumn seedlings. Key measures to ensure full seedlings and strong seedlings of wheat. According to the occurrence of local pests and diseases, each district should scientifically adjust the types of coatings or seed dressings to ensure that the winter wheat “white seeds†do not go to the ground.
The coated insecticide and fungicide formulation may be selected from 30.8% imidacloprid + 1.1% tebuconazole suspension seed coating, 6 ml per kg seed; 600 g / l imidacloprid suspension seed coating compound 60 g / l tebuconazole Suspension seed coating agent, the amount of seeds per kilogram is 4.8 grams, 0.5 grams; thiamethoxam 70% seed treatment dispersible granules compound 60 grams / liter of tebuconazole suspension seed coating agent, the amount of seed coating agent per kilogram of seed It is 4g, 0.5g; 50% phoxim emulsifiable concentrate can be used for seed dressing, 50% carbendazim WP can be used as bactericide, 0.2% seed dressing according to seed amount, insecticide and fungicide can be used. Mix the liquid mixture, mix it for 4~6 hours, dry it and sow it. Phosphorus seed dressing should be protected from light.
Seedling stage pest control
In the autumn wheat field, weeds have poor resistance to chemicals, which is a favorable opportunity for chemical weeding. Chemical weeding can be carried out according to the occurrence of weeds in the field. Chemical weeding should be carried out after the wheat tillering stage and the weeds 2~4 leaf stage. For the wheat field mainly based on the weeds, such as sage, leeks and other weeds, 10 g of phenylsulfuron-methyl WP or 1 g of benzenesulfuron-methyl suspension can be used for prevention and control. The grass-based wheat field can be treated with 70% fluzolsulfonate water dispersing granules per acre. When the wheat stubble and the gray planthopper occur seriously and reach the control index, it is necessary to timely carry out chemical control to prevent damage to the wheat seedling and spread the virus disease. (Zhang Jinliang Yuelu)
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