Floods are a common and severe weather event during the summer, posing significant threats to agricultural production. When crops are affected by locust infestations, it is generally not advisable to switch to other crops. With timely and proper management, these crops can still yield a good harvest. For example, when corn is flooded at the seedling stage, as long as the growing point remains undamaged, it is unlikely to die. However, immediate remedial actions should be taken to enhance field management.
First, damaged or broken leaves caused by hail should be pruned promptly to promote the growth of the heart leaves. Second, cultivating the soil after a locust plague helps raise the ground temperature and stimulate early growth, as the soil may become compacted and root activity slowed. Third, applying fertilizer after the disaster significantly aids plant recovery. A general recommendation is about 5 kilograms of carbonized iron per 667 square meters. Lastly, transplanting strong seedlings with soil and providing adequate water and nutrients after transplanting can help revive the crop.
Sorghum is known for its strong adaptability and regenerative ability, making it one of the most disaster-resistant crops. Even if the seedlings are damaged to a height of 33-67 cm, leaving 3-7 cm of stalks, as long as the growing point is intact, timely field management such as weeding, loosening the soil, and fertilizing can lead to regrowth, heading, and a reasonable yield. According to reports, sorghum begins to sprout from the base within 4-5 days after a flood, and within 40 days, each ear can produce 2-3 shoots, sometimes even more than 4-5. The ripening period is slightly delayed by about half a month. After a disaster, it is recommended not to remove stalks or leaves but to focus on field management to achieve better yields.
Soybeans have strong regenerative abilities. If they are flooded during the seedling stage, as long as the cotyledon nodes remain intact, they can recover with proper field management. They can develop new branches and flowers, leading to good yields. When lateral branches are affected by locusts, the stems may be severely damaged. Cultivating the soil and applying fertilizer usually leads to new growth from the cotyledon node within 6-7 days, allowing for flowering and fruiting.
Peanuts have strong branching and regenerative capabilities, with soft and elastic stems and leaves. They are particularly resilient in rainy conditions. When attacked by locusts, it's important to strengthen post-disaster management and avoid changing crops arbitrarily.
Millet has a wide range of adaptability and a short growing cycle. If it is flooded during the seedling stage, it can recover quickly with minimal damage. After a light flood, additional topdressing and pest control can help it thrive within a week, resulting in a good grain yield. However, if the millet is severely damaged or cut back, it may be difficult to recover, and switching to other crops might be necessary.
Sweet potatoes have weak resilience before rooting. After a flood, they are prone to rotting and dying. Timely replanting or re-sowing is crucial. Once the seedlings are rooted or start to crawl, they can recover quickly if the soil is loosened and fertilized promptly.
In summary, the remedial measures for crops affected by floods should be tailored based on the crop type and the extent of damage. It is essential to consult with agricultural technicians to determine the best course of action and ensure optimal recovery and yield.
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