What precautions should be taken when dressing wheat seeds? Keep these points in mind
When sowing wheat, chemical seed dressing can both increase yield and prevent pests and diseases. However, if the dressing is done improperly, it will not only fail to increase yield and prevent pests and diseases, but will also cause slow and uneven wheat emergence, and may even result in no emergence at all. So what should be paid attention to when dressing wheat seeds? Let's take a look.
1. Determine the type of pesticide to use
First, choose the type of pesticide according to the local pest and disease situation. If the local environment has mild pest damage at the seedling stage but disease is extremely important, then only a fungicide is needed for seed dressing, with no need to add an insecticide; conversely, add only an insecticide, with no need to add a fungicide. However, if pests and diseases occur together, then a fungicide and an insecticide should be used together for seed dressing. If underground pests are severe, chemical seed dressing cannot achieve the expected effect, and a combined method of seed dressing and soil treatment can be adopted for comprehensive control.
2. Pay attention to the dosage
When dressing seeds, the amount of pesticide applied is extremely important. Some farmers use pesticides by feel when dressing seeds and blindly increase the dosage, which may have the opposite effect. Practice has shown that when dressing wheat seeds, if pesticides such as triadimefon and phoxim are used in excessive amounts, they will cause chemical injury to the seeds, leading to delayed emergence and slow growth of wheat, and in severe cases, missing seedlings and dead seedlings. Therefore, pesticides must be used strictly according to the application standards, and never be used blindly.
3. Main seed dressing methods
When dressing seeds, also note that some pesticides have too high a concentration and are relatively strong in effect; if not properly handled, direct seed dressing may damage the seeds. When using pesticides such as phoxim for seed dressing, note that you should first reduce the concentration by diluting with water, then carry out seed dressing, and sow after covering and piling to let it sit. When using quintozene, triadimefon and hymexazol for seed dressing, first spray the seeds to moisten them before sowing, then dry them in the shade before sowing. If mixing an insecticide and a fungicide for seed dressing, first dress with the insecticide, and after piling to let it sit, then dress with the fungicide, and then sow.
4. Dress as you sow
Generally, when dressing seeds, dress as you sow, and do not let the time be too long, so as to avoid reducing the pesticide effect. Generally, after dressing with an insecticide, let it sit in a pile for 2-3 hours, and sow once the pesticide has been absorbed by the seeds. After dressing with a fungicide, you should sow immediately or dry the seeds in the shade before sowing. If the piling time is too long or the dressed seeds are left unused for a long time before sowing, chemical injury is very likely to occur.
The above is an introduction to the precautions for wheat seed dressing. We hope it can help you. To learn more related knowledge, please stay tuned to us.