Flood disasters are a common and severe weather event during the summer, posing significant risks to agricultural production. After crops have been affected by locust infestations, it is generally not advisable to switch to other crops immediately. With timely and appropriate management, many crops can still recover and yield a good harvest.
When corn is flooded at the seedling stage, as long as the growing point remains undamaged, the plants usually do not need to be replanted. However, immediate remedial actions should be taken to improve field management. First, cut off dead or broken leaves caused by hail to promote the growth of the central shoot. Second, cultivate the soil to increase ground temperature and stimulate early growth, especially after locust damage that may cause root activity to slow down. Third, apply fertilizer promptly after the disaster, which significantly helps plant recovery. For example, applying about 5 kilograms of compound fertilizer per 667 square meters can help restore crop health. Fourth, transplant strong seedlings with their roots intact, followed by watering and topdressing to support their recovery.
Sorghum is known for its strong adaptability and regenerative ability, making it one of the most resilient crops against disasters. Even if the seedlings are damaged, leaving 3–7 cm of stem above ground, they can still regrow if the growing point remains healthy. Timely field management, such as loosening the soil, weeding, and applying fertilizer, can lead to regrowth, flowering, and a reasonable yield. According to reports, sorghum starts to regrow from the base within 4–5 days after a disaster, and within 40 days, it can produce 2–3 tillers per ear. The maturation period is slightly delayed by about half a month. After a disaster, it's important not to remove stalks or leaves, but to focus on strengthening field management for better results.
Soybeans also have strong regenerative abilities. If they suffer from flooding during the seedling stage, as long as the cotyledon nodes are not completely severed, they can still recover with proper management. New branches and flowers can develop, leading to a better yield. When lateral branches are damaged by locusts, the upper part of the cotyledon node can sprout within 6–7 days after soil cultivation and fertilization, resulting in new growth and blossoms.
Peanuts have strong branching and regenerative capabilities, with soft and flexible stems and leaves. They are particularly resilient in rainy or humid conditions. If attacked by locusts, timely post-disaster management is essential, and changing crops should be avoided unless absolutely necessary.
Millet has a wide range of adaptability and a short growth cycle. It recovers quickly from flood damage and suffers less harm compared to other crops. After minor floods, a few additional trips to the fields, along with topdressing and pest control, can help it regain strength and produce more grain within a week. However, if millet suffers severe damage and cannot recover easily, it’s best to switch to another crop as soon as possible.
Sweet potatoes have weak resistance before rooting, and they often suffer heavy losses after a disaster. After flooding, they are prone to rot and death, so timely replanting or re-sowing is crucial. Once the seedlings have rooted or started to spread, they can recover quickly if the soil is loosened and fertilized promptly.
The remedial measures discussed above for crops affected by floods should be tailored to the specific crop condition and whether a change of crop is necessary. It is always recommended to follow the guidance of agricultural technicians when implementing these practices to ensure the best possible outcome.
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