Spraying foliar fertilizer is one of the commonly used extra-root fertilizer methods for vegetable farmers. In the production, the vegetable farmers are mostly spraying foliar fertilizers and pesticides in order to save time. In fact, due to the different nature of various fertilizers and pesticides, if the mix is ​​unreasonable, it will affect the effect of using fertilizers and even produce fertilizer damage. It is recommended that vegetable farmers pay attention to the following matters when mixing leaf fodder with pesticides.
First, to ensure that the shape of the mixed leaf fertilizer and pesticide is stable
This is because the foliar fertilizer may cause chemical or physical reactions with pesticides, affecting the effectiveness of pesticides or causing phytotoxicity. If the drug solution has poor performance, it is not suitable for mixing. Even if the physical properties of the liquid medicine are good after mixing, a small-scale test must be performed first to see if it is prone to harm due to fertilizer and then used on a large area. For example, the foliar fertilizers containing boric acid and ferrous sulfate are mostly acidic, while the copper preparations such as copper hydroxide are alkaline. If they react after mixing, they will affect each other's effects.
Second, pay attention to the order of the mixture of foliar fertilizers and pesticides
Usually, a sufficient amount of water is used first to prepare a single-agent liquid, and then the liquid medicine is used to dilute another single agent. However, it is not possible to mix two single agents first, and then dilute with water to avoid adverse reactions. The destruction of ingredients and deterioration of physical properties.
When the foliar fertilizer is mixed, the order of mixing the foliar fertilizer and the pesticide is usually: the foliar fertilizer, the wettable powder, the suspension agent, the water agent, and the emulsifiable concentrate are added one by one, and each type is added, and the mixture is thoroughly stirred and then added into the next one. .
Third, pay attention to the use of water when mixing
Water has a great influence on the liquid, and the pH, ion concentration, etc. of the water will affect the effect. The water used for dispensing should be neutral water with low ion concentration, such as clean rain and river water.
Fourth, pay attention to the current use
Although there is no adverse reaction at the time of the drug solution, the drug solution is prone to produce a slow reaction for a long time, which results in loss of efficacy or susceptibility to phytotoxicity. Although some pesticides are stable under weak alkaline conditions, they should also pay attention to the current use, and if they are placed for a long time, they are easy to fail.
Fifth, pay attention to acid and alkali
Also need to test to observe whether there is flocculation, precipitation or discoloration, bubble generation and other phenomena after mixing. If the drug solution has poor performance, it is not suitable for mixing. Even if the physical properties of the liquid medicine are good after mixing, a small-scale test must be performed first to see if it is prone to harm due to fertilizer and then used on a large area.
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