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How to make up the injury in the orchard
1. Spray water on the tree. If the damage is detected early, immediately spray the affected plants with water to dilute and wash away the pesticides that have adhered to the leaves and branches, reducing the amount of pesticide absorbed by the tree. This helps minimize further harm and supports quicker recovery.
2. Apply a neutralizing spray. For leaves showing signs of phytotoxicity, you can use a 50% humic acid solution (dissolved in a small amount of water first) diluted to 3000 times and apply it as a foliar spray. After 3–5 days, the leaves should gradually regain their green color. If the issue is caused by copper sulfate from Bordeaux mixture, a 0.5–1% lime solution can be sprayed to neutralize the effect. In cases of overuse of the lithosulfur mixture, after washing with water, a 500-times diluted rice vinegar solution can be applied to help reduce toxicity.
3. Apply fertilizer promptly. Once fruit trees show signs of phytotoxicity, it's important to top-dress them with appropriate nutrients to help them recover faster. For example, if the damage is due to acidic pesticides, you can sprinkle lime or spray a 1% bleaching powder solution. If the problem stems from alkaline pesticides, applying an acid-based fertilizer like ammonium sulfate can help. Regardless of the cause, spraying a mixture of 0.3% urea and 0.2% potassium dihydrogen phosphate every 15–17 days, possibly up to two or three times, can significantly reduce the damage.
4. Loosen the soil. After fruit trees are affected by phytotoxicity, it's crucial to loosen the soil around the roots by cultivating it to a depth of 10–15 cm. This improves soil aeration, promotes root development, and enhances the tree’s ability to recover.
5. Prune appropriately. Timely pruning is essential after phytotoxicity occurs. Remove dead branches and fallen leaves to prevent the spread of damage and reduce the risk of secondary infections or diseases.
6. Provide care and patience. Phytotoxicity can be stressful for plants, so giving them extra attention, proper care, and time will greatly aid in their recovery. With consistent effort, most trees can bounce back and thrive again.