What are the effective ways to improve the efficacy of fungicides?
What methods can improve the efficacy of fungicides? Please introduce the following methods you can refer to for improving fungicide efficacy: Mix concentrations properly. Different fungicides have specific requirements for their application concentration. When mixing the concentration, you must strictly follow the "instruction manual" and must not increase or decrease it at will. Choose the right spraying...
What methods can improve the efficacy of fungicides? Please introduce
To improve the efficacy of fungicides, you can refer to the following methods:
Mix the concentration properly. Different fungicides have specific requirements for their application concentration. When mixing the concentration, you must strictly follow the "instruction manual" and must not increase or decrease it at will.
Choose the right spraying time. Spraying fungicides too late or too early will affect the control effect. Medication should be applied in a timely manner according to the occurrence pattern of different crop diseases and specific conditions. It is usually best to use them before the disease occurs (protective application) or at the early stage of the disease (preventive application).
Master the number of applications. The number of fungicide sprays is mainly determined by the length of the effective period of the pesticide and weather conditions. Generally, spray once every 10 to 15 days, for a total of 2 to 3 sprays. In special circumstances, such as rain after application, a supplementary spray should be given in time.
Improve the quality of application. The amount of pesticide used should be appropriate. Too much pesticide will increase costs and easily cause phytotoxicity, while too little pesticide cannot achieve the purpose of application. The quality of application should be paid attention to. When spraying, the spray should be uniform, and every effort should be made not to miss any area.
Strictly prevent phytotoxicity. There are many reasons why fungicides cause phytotoxicity. First, pesticides with relatively strong water solubility are generally prone to causing phytotoxicity. Second, different crops have different sensitivities to pesticides. For example, Bordeaux mixture generally does not cause phytotoxicity, but it can also cause phytotoxicity in copper-sensitive crops. Beans, potatoes, and cotton are sensitive to lime sulfur mixture. In addition, crops react differently to pesticides at different growth and development stages. Generally, seedlings and the booting and flowering stages are prone to phytotoxicity. Moreover, applying pesticides under conditions such as high temperature and drought, strong sunlight, heavy fog, or high humidity can easily cause crop phytotoxicity.
Be cautious about mixing pesticides. Many fungicides are alkaline pesticides, so they cannot be mixed with insecticides that easily decompose and become ineffective when exposed to alkaline substances, such as Bordeaux mixture and lime sulfur mixture, which are alkaline. Some fungicides, such as carbendazim, cannot be mixed with fungicides such as Bordeaux mixture, lime sulfur mixture, and thiophanate, as this will likewise cause the insecticidal (fungicidal) microorganisms to lose their physiological activity and insecticidal (fungicidal) ability and become ineffective.
Pay attention to avoiding pesticide resistance. The use of fungicides also involves the problem of crop disease resistance. To avoid disease resistance, on the basis of scientifically selecting pesticides, it is necessary to effectively alternate (rotate) the use of different types of pesticides, and it is strictly forbidden to use one pesticide alone for a long time.
Click to get more fungicide application techniques
Click to get more pesticide application techniques