About the key technology of pesticide and fungicide manufacturers
Fungicide manufacturers are a class of pesticides used to control plant diseases caused by various pathogenic microorganisms, generally refer to fungicides. The use of fungicides is a cost-effective way to control plant diseases.
The spraying time is knowledgeable, and the pesticide manufacturer must choose accurately: Generally speaking, spraying the fungicide too late or too early will affect the control effect. Premature spraying will not only cause waste, but also reduce the control effect. However, if the spraying time is too late, a large number of pathogens have invaded the host or caused harm. At this time, even if the systemic therapeutic agent is sprayed, it will be "more effective with less effort" because of the "repair after the sheep is gone". Therefore, the use of fungicides should be based on the occurrence law and prediction of different crop diseases, as well as the specific conditions of the disease occurrence. Usually, the application time of fungicides should be mastered before the onset (protective medication) or early onset (preventive prevention).
There are many reasons for the prevention of phytotoxicity: fungicides cause phytotoxicity for many reasons. First, drugs with strong water solubility are prone to phytotoxicity. Secondly, different crops have different sensitivities to pesticides. For example, Bordeaux mixture generally does not cause phytotoxicity. But copper-sensitive crops can also produce phytotoxicity. Beans, potatoes, and cotton are sensitive to lime-sulfur mixtures and have a higher chance of phytotoxicity. Furthermore, different growth and development stages of crops have different responses to pesticides, and generally seedlings and booting flowering stages are prone to phytotoxicity. In addition, phytotoxicity is also related to meteorological conditions, such as temperature and sunshine. Generally, medication under conditions such as high temperature and drought, strong sunshine or heavy fog and high humidity can easily cause crop phytotoxicity.
The frequency of medication should not be too much: the frequency of spraying of fungicides is mainly determined according to the length of the residual period of the drug and the weather conditions. Generally, spray once every 10 to 15 days, and spray 2 to 3 times in total. In special circumstances, such as rain after spraying, it should be re-sprayed in time.
