How to treat peanut root rot? A detailed guide to prevention and control methods

During the growth period, peanuts can develop root rot. If not prevented and controlled in time, it will lead to reduced yield. So how do you treat peanut root rot?

1. Seeds: when sowing, buy seeds that do not carry pathogens, and buy varieties with stronger disease resistance. This has a good effect on preventing root rot. By starting from the root cause, the chance of disease occurrence is reduced. If external environmental factors are the same, seeds with better disease resistance will generally have a relatively lower chance of disease occurrence. At the same time, seed dressing treatment before sowing is a common measure used by many growers to prevent root rot. There are many available chemicals, such as the common difenoconazole, fludioxonil, thiram, carbendazim, etc. Choose the chemical according to the local severity and chemical resistance. After seed dressing, dry them in the sun and then sow.

2. Crop rotation: if peanut root rot in certain fields becomes more severe year after year, it is recommended to practice rotation and change crops. After 2-3 years, the situation will improve greatly. In fact, this is true not only for peanuts, but for other crops as well. It is not recommended to grow them continuously for many years.

3. Field management: from sowing to harvest, field management must keep up, such as reasonable water and fertilizer, weed control, and controlling excessive growth when necessary. When peanut plants are relatively robust, their own ability to resist disease will be strengthened. On the contrary, if peanut plants are short and grow weakly, their own resistance is weaker, and disease occurrence will be more severe.

4. Chemical control: use 56% metham·hymexazol, 20-25 milliliters per bucket of water for root drenching; or use 30% metalaxyl·hymexazol, 10 milliliters per bucket of water for spraying; or use 68% hymexazol·thiram, 15 milliliters per bucket of water; the above chemicals can be applied together with a balanced foliar fertilizer.