Remedies and Rescue Measures for Phytotoxicity in Fruit Trees

Irrigation and Water Spraying

If it occurs early, the affected plants should be sprayed with water immediately to wash them clean. If the phytotoxicity is caused by systemic pesticides such as carbofuran granules applied to the soil, drainage and washing measures should be taken promptly, that is, first flood-irrigate the orchard surface, then irrigate once more with a fast-flowing flush of water.

Spraying Neutralizing Agents

If the phytotoxicity causes leaf whitening, granular 50% sodium humate (first dissolved in a small amount of water) can be used, prepared as a 3000-fold solution for foliar spraying, or prepared as a 5000-fold solution for irrigation; after 3 to 5 days, the leaves will gradually turn green again. If the phytotoxicity is caused by the copper sulfate ions in Bordeaux mixture, a 400- to 500-fold rice vinegar solution can be sprayed. If the phytotoxicity is caused by improper use of dimethoate, a 200-fold borax solution can be sprayed 1 to 2 times. If the phytotoxicity is caused by misuse or excessive use of pesticides such as organophosphates, pyrethroids and carbamates, a 0.5% to 1% lime water or laundry detergent solution can be sprayed for detoxification.

Timely Topdressing

After suffering phytotoxicity, fruit trees grow weakly. A foliar spray of 0.3% urea solution + 0.2% monopotassium phosphate solution can be applied once every 15 to 17 days, for 2 to 3 consecutive sprays.

Loosening and Mounding Soil

The orchard soil should be cultivated and loosened in a timely manner, to a depth of 10 to 15 cm. Manual mounding should be carried out around the root crown, and phosphorus and potassium fertilizers should be applied additionally to promote root development and enhance the fruit trees' recovery capacity and virus resistance.

Moderate Pruning

Cut off dead branches and remove dead leaves.