What are the ways to improve the effectiveness of fungicides?
How can the effectiveness of fungicides be improved? What should be noted when using fungicides? We would also like experienced netizens to help explain. Fungicides are also called biocides, algicides and microbicides. When used well, fungicides can effectively kill or inhibit pathogenic bacteria, thereby protecting plants from the harm of pathogenic bacteria. Therefore, Zhongdiwang has compiled...
How can the effectiveness of fungicides be improved? What should be noted when using fungicides? We would also like experienced netizens to help explain.Fungicides are also called biocides, algicides and microbicides. When used well, fungicides can effectively kill or inhibit pathogenic bacteria, thereby protecting plants from the harm of pathogenic bacteria. Therefore, Zhongdiwang has compiled methods for improving fungicide effectiveness and precautions, listed in detail below for netizens' reference.
1. Reasonably configure the pesticide concentration:
Different fungicides each have special requirements for their use concentration. When configuring the concentration, be sure to strictly follow the "instruction manual"; do not arbitrarily increase or reduce it.
2. Choose a good spraying time:
Spraying fungicides too late or too early will affect the control effect. Pesticides should be applied in a timely manner according to the occurrence patterns of different crop diseases and specific conditions. Usually, use before disease onset (protective application) or at the early stage of disease onset (preventive measures) is best.
3. Master the number of applications:
The number of fungicide sprays is mainly determined by the length of the pesticide's residual effect period and meteorological conditions. Generally, spray once every 10-15 days, for a total of 2-3 sprays. In special circumstances, such as rain after application, promptly apply one additional spray.
4. Improve application quality:
The amount of pesticide used should be appropriate. Using too much will increase costs and easily cause phytotoxicity, while using too little will fail to achieve the purpose of application. The quality of application should be emphasized; when spraying, the spray should be uniform, and every effort should be made not to miss any areas.
5. Prevent phytotoxicity:
There are many reasons why fungicides cause phytotoxicity. First, pesticides with stronger water solubility generally easily cause 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. Legumes, potatoes and cotton are sensitive to lime sulfur mixture. Furthermore, different growth and development stages of crops respond differently to pesticides; generally, the seedling stage and the booting and flowering stages are prone to phytotoxicity. In addition, applying pesticides under conditions of high temperature and drought, strong sunlight, heavy fog or high humidity can easily cause crop phytotoxicity.
6. Pay attention to pesticide mixing:
Because many fungicides are alkaline pesticides, they cannot be mixed with insecticides that easily decompose and become ineffective when encountering 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 similarly cause the insecticidal (fungicidal) microorganisms to lose physiological activity and insecticidal (fungicidal) ability, thus becoming ineffective.
7. Pay attention to avoiding drug resistance:
The use of fungicides also involves the problem of crop disease resistance. To avoid disease resistance, on the basis of scientifically selecting pesticides, effectively carry out alternating (rotating) use of different types of pesticides, and strictly prohibit long-term single use of one pesticide.
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