If the wheat chemical is mixed properly, it will not only prevent disease and insects, but also cause slow emergence of wheat, uneven emergence, and even affect the normal growth of wheat. Under normal circumstances, wheat seed dressing should pay attention to the following points before seeding, and the pesticide net is compiled for reference:
Determine the type of medication based on the occurrence of local pests and diseases. If the local wheat seedlings occur very lightly, the disease occurs heavier, and only the fungicide can be used for seed dressing. It is not necessary to add pesticides; if the pests and diseases are mixed, it is necessary to mix with pesticides and mix with fungicides. If the underground pests are heavier and the pesticides do not reach the expected control effect, the combination of seed dressing and soil treatment should be adopted to control the wheat pests.
Accurately grasp the amount of pesticides . Some farmers use the estimated medication when they are planting wheat, and blindly increase the dosage. Practice has proved that if the amount of wheat used in the dressing with powder rust, phoxim and other pesticides is too large, it will cause phytotoxicity, which will lead to delay in the emergence of wheat, slow growth, and the loss of seedlings and ridges.
Pay attention to the seed dressing method. When wheat is mixed with phoxim, the pesticide should be diluted with water, then mixed with wheat, and covered with scum. Wheat is mixed with pentachloronitrobenzene, triadimefon and lycoxil. The seeds should be sprayed with water to moisten, then the agent is evenly mixed on the seeds, and then immediately sown or dried in the summer. If you want to use seed dressing with pesticides and seed dressing with fungicides, you should first mix the insecticides, mix the fungicides after the piles, and then immediately sow.
With the mix and play, can not be placed for a long time. After the wheat is seeded with insecticides, it is generally piled up for 2 to 3 hours, and the length is 6 hours. After the pesticide is absorbed by the wheat seeds, it is sown immediately. The China Pesticide Network reminds that after the wheat is mixed with the fungicide, it should be sown immediately after sowing or drying. Some farmers have been suffocating for too long after the wheat medicinal dressing, or they are not placed for a long time after seed dressing, which is easy to cause phytotoxicity.
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