1. Rinse with water. If improper drug use or improper use of spraying machinery is found in time after spraying, the sprayer can be immediately filled with clear water to spray and wash the branches and leaves of crops repeatedly, so as to wash away the drugs remaining on the surface of plants and reduce the phytotoxicity. When washing, the air pressure of the nozzle should be sufficient and the amount of water sprayed should be large.
Step 2 spray fertilizer. Spraying foliar fertilizers such as potassium dihydrogen phosphate and urea solution on symptomatic crops can effectively reduce the degree of phytotoxicity and promote crop growth.
3. Spray gibberellin (920). Gibberellin can alleviate the phytotoxicity of 2,4-D and dimethyl carbon tetrachloride to many plants. After the jujube tree has the symptoms of phytotoxicity, spraying 200 kilograms of gibberellin on every 2 grams of leaves can reduce the phytotoxicity.
4. Spraying regulator+foliar fertilizer. After symptoms appear, timely spraying brassinolide (gibberellin, sodium nitrophenolate)+a small amount of urea+a small amount of potassium dihydrogen phosphate+an appropriate amount of rapid rooting solution, and repeated spraying at intervals of about 4 days can effectively alleviate the phytotoxicity of herbicides. The main functions of spraying the above-mentioned regulators and fertilizers are to reduce phytotoxicity, promote crop growth and improve safety.