Causes of vegetable injury: First, misuse of pesticide or misuse of herbicide; Second, the application of pesticide concentration is too large or repeated applications; Third, the application of high temperature or high humidity conditions; Fourth, the application The inferior pesticides; Fifth, the soil application is not uniform enough. After vegetable injury occurs, remedial measures should be taken immediately.
First, spray water. If leaves and plants cause phytotoxicity due to spraying liquid, they can quickly spray the leaves with plenty of clean water when the early liquid has not been completely penetrated or absorbed. Rinses 3 to 4 times repeatedly to flush out the liquid on the surface of the plants as much as possible. And with the cultivator loose soil, promote root development, so that plants quickly return to normal growth.
Second, topdressing available fertilizer. After the occurrence of phytotoxicity, timely watering and topdressing urea and other available fertilizers. In addition, foliar spray of 1-2% urea or 0.3% potassium dihydrogen phosphate solution is also required to promote plant growth and increase resistance to phytotoxicity.
Third, the use of antidote or plant growth regulators. According to the nature of the pesticides causing the injury, the use of the opposite of the nature of the drug and neutralization, such as the spraying of excessive copper sulfate can be sprayed after the application of 0.5% quicklime, spraying paclobutrazol can be sprayed after the application of gibberellin relief, can also be used Foliar and other leaf spraying.
Fourth, irrigation field. For fields with excessive soil application, irrigation should be performed as soon as possible, so that a large number of drugs will be discharged outside the field with water to reduce the damage.
V. Remove the victim. The fruits, branches and leaves of the vegetables are removed in time to prevent further propagation and infiltration of the chemicals in the plants.