The bactericides needs to have a reasonable concentration when it is used. When it is operated, whether it is a liquid or a wettable powder, it needs to be diluted with water before spraying. Different bactericides have required concentration, so it is strict. According to the specification, the reasonable concentration is more conducive to the effectiveness of the bactericides. If the ratio is arbitrarily matched, the concentration will be too high to cause phytotoxicity to the crop, and the concentration is too low to meet the control requirements.
Suitable time for spraying bactericides
The spraying time of the bactericides is directly related to the control effect. Spraying too early will cause waste of the medicament 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 bactericides can be selected before or during the onset of the disease.
The quality of the bactericides used 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, and sprayed 2-3 times. If it is raining after application, it needs to be refilled. The method of improving the quality of the drug is that the spray point is evenly and finely sprayed, and the stems and leaves of the plant are sprayed.