What are the latest precautions for wheat seed dressing?
When sowing wheat, chemical seed dressing can not only increase yield but also 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 wheat emergence, uneven emergence, and may even result in a phenomenon of no emergence at all. So what should be noted when dressing wheat seed? Let's take a look together.
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 relatively light insect pests at the seedling stage but diseases are 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 need to be used together for seed dressing. If underground pests are severe, chemical seed dressing cannot achieve the expected effect, so a combined method of seed dressing and soil treatment can be used for integrated control.
2. Pay attention to the dosage
When dressing seed, the application rate of the pesticide is extremely important. Some farmers use pesticides by feel when dressing seed and blindly increase the dosage, which may have the opposite effect. Practice has shown that if pesticides such as triadimefon and phoxim are used in excessive amounts when dressing wheat seed, they will cause phytotoxicity to the seeds, leading to delayed wheat emergence and slow growth, and in severe cases, a phenomenon of missing seedlings and dead seedlings. Therefore, pesticides must be used strictly according to the usage standards, and pesticides must never be used blindly.
3. Main seed dressing methods
When dressing seed, also note that some pesticides have too high a concentration and strong potency. If they are not handled properly, direct seed dressing may damage the seeds. When using pesticides such as phoxim for seed dressing, note that the concentration should first be reduced by dilution with water, then seed dressing should be carried out, and after covering and piling for fermentation, sowing should be done. When using quintozene, triadimefon, and tebuconazole for seed dressing, first spray the seeds to moisten them, then sow, and afterward dry them in the shade before sowing. If an insecticide and a fungicide are mixed for seed dressing, first dress with the insecticide, then after piling for fermentation, dress with the fungicide, and then sow.
4. Dress as you sow
Generally, when dressing seed, dress as you sow, and do not let too much time pass, so as to avoid reduced pesticide efficacy. Generally, after dressing with an insecticide, pile for fermentation for 2-3 hours, and once the pesticide has been absorbed by the seeds, sowing can be done. After dressing with a fungicide, sowing should be understood or the seeds should be dried in the shade before sowing. If the piling and fermentation time is too long, or if the dressed seed is left for a long time without being sown, phytotoxicity is very likely to occur.
The above is an introduction to the precautions for wheat seed dressing. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.