Whether it is a liquid or a wettable powder, it is necessary to dilute the water before spraying. Different bactericides are required to use the concentration. Therefore, the ratio should be strictly in accordance with the instructions. The reasonable concentration of the bactericide is more conducive to the effectiveness of the bactericide. If the ratio is arbitrarily matched, the concentration will be too high to cause phytotoxicity to the crop; if the concentration is too low, the control requirements will not be met.
Suitable spraying time
The time of spraying the bactericide is directly related to the control effect. Spraying too early will cause waste of the drug and reduce the control effect; the late pathogen has already caused damage to the crop. Therefore, it is necessary to timely use drugs according to the laws, predictions and specific conditions of different diseases. In general, the time of administration of the bactericide can be selected before or during the onset of the disease.
Improve the quality of medication
The quality of the bactericide includes the amount of the drug, the number of times of administration, and the quality of the spray. The amount of medicine should be appropriate. Too much medicine will increase the cost and cause phytotoxicity. If it is too little, it will not achieve the control effect. Therefore, it will increase or decrease according to the specific conditions. The number of medications may depend on the residual period of the drug and the weather conditions. Generally, it is sprayed once every 10-15 days for a total of 2-3 times. If it is raining after application, it needs to be refilled. The method of improving the quality of the medicine is that the spray point is evenly and finely sprayed, and the stems and leaves of the plant are sprayed.
Strictly prevent phytotoxicity
There are many reasons for fungicides causing phytotoxicity. The agents themselves, crop sensitivity, crop growth stages and climatic conditions all have an impact. In general, drugs with strong water solubility and crops have a high probability of causing phytotoxicity in the seedling stage and the flowering stage of the booting stage, high temperature and drought, fog and high humidity, and therefore need to be handled with caution.
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