After heavy rainfall, waterlogging in soybean fields is particularly dangerous during the seedling and maturity stages. It’s crucial to drain the field promptly when water accumulates, as prolonged water exposure can lead to root rot and plant death. Timely drainage helps maintain healthy growth and ensures a good yield.
If the field has uneven seedlings due to long-term waterlogging, it's important to check the field regularly and fill in any gaps. To rescue weak or missing plants, transplanting nearby seedlings with soil and water can significantly improve survival rates. This practice helps the new plants establish quickly and reduces transplant shock.
Weeding should be done carefully after waterlogging, focusing on removing surface weeds that are lightly affected. This prevents competition for nutrients and improves air circulation around the plants.
Early topdressing is essential for recovery. Combining this with cultivation helps strengthen the plants and promote healthy development. Apply 5–10 kg of urea per acre, ideally during the second round of cultivation. During the early flowering stage, you can spray a solution of potassium dihydrogen phosphate (30 grams per acre mixed with 40 kg of water) on the leaves. This not only supports plant growth but also helps control aphid infestations when applied together.
Soybeans are prone to diseases like rust, aphids, and mites due to high humidity during the growing season. To prevent soybean rust, mix 3 grams of triadimefon with 50 kg of water and spray the field. For aphid control, use 100 grams of 10% imidacloprid per mu with 30–50 kg of water. For other pests, 2.4% deltamethrin can be used at the recommended rate per acre.
If the soybean plants grow too vigorously or become leggy, chemical control methods such as spraying paclobutrazol can help regulate growth and improve plant structure. This ensures better pod formation and higher yields.
By following these practices, farmers can effectively manage waterlogged conditions, support plant health, and protect their crops from pests and diseases, ultimately leading to a more successful harvest.
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