Autumn sowing is one of the key periods for preventing and controlling wheat diseases, weeds and weeds. It is not only able to control the damage of disease and weeds in autumn, but also reduce the number of diseases, pests and weeds in winter, and reduce the number and usage of chemical pesticides. . In order to conscientiously do a good job of prevention and treatment of winter wheat disease, weeds and weeds, the following guidelines are proposed.
Seed treatment before seeding Wheat seed coating or dressing seed dressing is the main prevention and control of underground pests and the prevention of wheat seed propagation, soil-borne diseases and autumn seedling powdery mildew, leaf rust, wheat spiders, and planthoppers. Measures are also key measures to ensure the whole seedlings and seedlings of wheat. According to the occurrence of local diseases and pests, scientifically adjust the types of coating or seed dressing agents to ensure that wheat “white seeds†does not fall to the ground.
Seed coating insecticides and fungicides formula can be used Obirui 31.9% Suspension 6ml/kg (seed volume, the same below), 600g/L imidacloprid suspension seed coating agent 4.8g/kg+60g/L tebuconazole suspension Seed coating agent 0.5g/kg, thiamethoxam 70% seed treatment dispersible granules 4g/kg+60g/L tebuconazole suspension seed coating agent 0.5g/kg; 50% phoximite for seed dressing insecticide Emulsifiable concentrates, fungicides can be used 50% carbendazim WP according to the seed amount of 0.2% seed dressing, insecticides and fungicides can be mixed liquid seed dressing, stuffy stuffy 4 to 6 hours, dry after sowing. Phoxim dressing should pay attention to dark operation.
Seedling pests and weed control Weeds in autumn wheat fields have poor resistance to small weeds. It is an opportune time for chemical weed control. Chemical weeding can be carried out in accordance with the occurrence of weeds in the field. Chemical weeding should be carried out after the wheat tillering stage and during the weeding stage of 2 to 4 leaves. For wheat fields dominated by sow weeds such as sow plant and leeks, 10% tribenuron-methyl WP may be used per acre, or 1 gram of 75% tribenuronic-methyl-sulphonate, or 72% 2,4- 50ml drops of butyl phthalate cream prevention and treatment; take wheat and other gramineous weeds as the main wheat field, can use 70% of chlorsulfuron-methyl dispersible granules per acre 3 to 4 grams of prevention and treatment. When the wheat stubble and the planthopper are serious in the wheat field and reach the prevention and control index, it is necessary to conduct chemical prevention and control in time to prevent damage to the wheat seedlings and transmission of the virus disease.
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