Four precautions for wheat seed dressing before sowing that you must remember

@#@245@#@If the chemical seed dressing before sowing is not operated correctly, it will not only fail to prevent diseases and pests, but may also lead to slow and uneven emergence of wheat, and even affect the normal growth of wheat seedlings. In general, the following 4 points should be noted when dressing wheat seeds with chemicals before sowing:

Determine the type of pesticide according to the local occurrence of pests and diseases. If the local pest infestation at the wheat seedling stage is very mild and the disease occurrence is severe, only a fungicide seed dressing is needed, and no insecticide is necessary; if pests and diseases occur together, both an insecticide seed dressing and a fungicide seed dressing should be used; if soil-dwelling pests occur severely and chemical seed dressing cannot achieve the expected control effect, seed dressing combined with soil treatment should be adopted to control wheat pests.

Accurately control the amount of pesticide used. Some farmers estimate the dosage when dressing wheat seeds with chemicals and blindly increase the amount used. Practice has shown that when wheat seeds are dressed with pesticides such as triadimefon and phoxim, if the amount used is too large, it will cause obvious phytotoxicity to wheat, ranging from delayed emergence and slow growth in mild cases to even missing seedlings and broken rows in severe cases. Therefore, special attention should be paid to accurately controlling the amount of pesticide used.

Pay attention to the seed dressing method. When dressing wheat seeds with phoxim and similar pesticides, the pesticide should first be diluted with water, then mixed evenly with the wheat seeds, covered and piled to let stand, and then sown. When dressing wheat seeds with quintozene, triadimefon and tebuconazole, the seeds should first be sprayed with clean water until moist, then the pesticide should be evenly mixed onto the seeds, and then sown immediately or sown after drying in the shade. If both an insecticide seed dressing and a fungicide seed dressing are to be used, the insecticide should be applied first, and after piling to let stand, the fungicide should then be applied, followed by immediate sowing.

Dress and sow immediately; do not leave for too long. After wheat seeds are dressed with an insecticide, they are generally piled to let stand for 2 to 3 hours, or at most 6 hours, and sown immediately after the pesticide is absorbed by the wheat seeds. Generally, after wheat seeds are dressed with a fungicide, they should be sown immediately or sown immediately after drying in the shade. Some farmers leave the wheat seeds piled to let stand for too long after chemical seed dressing, or leave them for a long time after seed dressing without sowing, which will cause phytotoxicity to wheat. If wheat seeds are spread out in the sun to dry after being dressed with a fungicide, the disease prevention effect will be significantly reduced. In addition, the seed dressing operating procedures must be strictly followed to prevent poisoning of people and livestock, and it is best to carry out unified seed dressing.