How to improve the efficacy of fungicides?

How to improve the efficacy of fungicides? What should I pay attention to when using fungicides? Also ask experienced netizens to help introduce fungicides, also known as fungicides, algicides, microbicides, fungicides can effectively kill or inhibit pathogens, so as to protect plants from the harm of pathogens, so the planting network collates the fungicide efficacy improvement methods and matters needing attention, the following detailed list for netizens' reference. First, rational allocation of drug concentration: the use of different fungicides have special requirements, the configuration of concentration must be in strict accordance with the "instructions" operation, can not be increased or reduced at will. Second, choose the spraying time: spraying fungicide too late or too early will affect the control effect. Drugs should be used in time according to the occurrence regularity and specific conditions of different crop diseases. It is usually better to use it before the onset of the disease (protective medication) or in the early stage of the disease (prevention). Third, master the application times: the spraying times of fungicides are mainly determined according to the duration of the fungicides and meteorological conditions. It is usually sprayed every 10 to 15 days, a total of 2 spray 3 times. In case of special circumstances, if there is rain after application, it should be sprayed in time. Fourth, to improve the quality of drug use: the number of drugs should be appropriate, too much drugs will increase the cost, easy to cause drug damage, but too little drugs can not achieve the purpose of drug use. The quality of medicine should be paid attention to, and uniform spray is required when spraying, so as not to leak spray. Fifth, to prevent drug damage: there are many reasons for drug damage caused by fungicides. First of all, agents with strong water solubility are prone to drug damage, and secondly, different crops have different sensitivities to drugs. For example, Bordeaux liquid generally does not cause drug damage, but crops that are sensitive to copper can also cause drug damage. Beans, potatoes and cotton are sensitive to stone sulfur mixture. In addition, the response to pesticides is also different in different growth and development stages of crops, and the general seedling and booting flowering stage are easy to produce drug damage. In addition, it is easy to cause crop drug damage under the conditions of high temperature and drought, strong sunshine or heavy fog, high humidity and so on. Sixth, pay attention to the mixed use of drugs: because many fungicides are alkaline pesticides, they can not be mixed with pesticides that are prone to decomposition and failure of alkaline substances, such as Bordeaux solution, stone-sulfur mixture and so on. There are some fungicides such as carbendazim can not be mixed with Bordeaux solution, stone sulfur mixture, topurazine and other fungicides, which will also cause the loss of physiological activity and insecticidal ability of insecticidal (bacterial) microorganisms. Seventh, pay attention to avoid drug resistance: the use of fungicides also has the problem of drug resistance to crop diseases. In order to avoid disease resistance, it is necessary to do a good job in the alternating use of different types of pesticides on the basis of scientific selection of pesticides, and it is strictly forbidden to use one pesticide alone for a long time. The effect of Ningnanmycin how to use carbendazim