1. Reasons for the occurrence of phytotoxicity: phytotoxicity occurs in vegetables in greenhouses. Symptoms usually appear within a few hours to 3-4 days after acute injury, and burns, withering, fallen leaves, fallen flowers, and fruit drop appear. Chronic injury will only show symptoms after a long period of time, manifested as physical activity suppression, poor growth, abnormal leaves, delayed maturation, and poor quality. The main reasons for the emergence of phytotoxicity: (1) Failed to prescribe the right medicine and failed to clarify the object of prevention and use of the medicine used. (2) Did not master the period of medication. (3) The use of Pesticides is too high. (4) Use of crop sensitive pesticides, or mixing of acid and alkaline pesticides, etc. (5) Use fake and fake pesticides. 2. Correct use of pesticides: (1) Use high-efficiency, low-toxicity, low-residue pesticides, and pay attention to reasonable collocation and alternate use. (2) Strictly control the use of drug technology, the amount of drug, the concentration must be accurate, the mixing should be sufficient, the spraying should be uniform, and the science mixed. (3) It is forbidden to use counterfeit and fake pesticides, and the purchase must be purchased by the reputable pesticide management department. (4) Grasp the time of spraying: Generally, it is decided according to the temperature and humidity in the greenhouse. In the morning, the humidity in the greenhouse is high, and the spray will reduce the concentration of pesticides. However, spraying wettable powder can be easily dissolved in dew, thus accelerating the absorption of chemicals. At noon, spraying medicine due to the high temperature of the greenhouse, the transpiration will be delayed if the medicine is too late to be absorbed. Manganese zinc pesticides will produce phytotoxicity. 3, the specific solution to the occurrence of phytotoxicity: For the phytotoxicity caused by excessive application of the soil, irrigation can be used to wash fields, dilute the drug, reduce the injury. For phytotoxicity caused by excessive application of vegetables, leaves, and plants, watering, increasing application of phosphorus and potassium fertilizers, and cultivating loose soil can promote root development, increase resistance, and reduce the drug content of crop plants. For the damage of crop leaves caused by spraying the wrong medicine, spray fresh water to rinse the remaining drugs on the leaves, and strengthen field management; and then spray the slow release agent to degrade the damage, and promote the plant to return to normal growth and development, such as Ye Mianbao and other plant growth regulators. Organic fertilizer, humic acid, etc. can all alleviate the harm caused by pesticides. Dingmin Pharmaceutical supply Sorofenib API and Sorofenib Intermediates with high purity and best price. The main products CAS No are as follows:475207-59-1, 220000-87-3, 327-78-6, 284462-37-9. Sample can be sent if you request.COA will be along with the quote. Tech pack can be offered. Cas 475207-59-1,Sorofenib Intermediates,Api Sorafenib Tosylate Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com
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