Spraying foliar fertilizer is one of the common methods of root dressing used by vegetable farmers. In production, vegetable farmers are mostly sprayed with foliar fertilizer and pesticides in order to save trouble. In fact, due to the different nature of various fertilizers and pesticides, if the compounding is unreasonable, it will affect the effect of using fertilizers and even the harmful effects of fertilizers. It is recommended that the vegetable farmers pay attention to the following matters when mixing foliar fertilizer with pesticides.
Some notes on the use of foliar fertilizer and pesticides:
First, to ensure the shape of the foliar fertilizer and pesticides after mixing
This is because foliar fertilizer may chemically or physically react with pesticides, affecting the effectiveness of pesticides or causing phytotoxicity. If the liquid has poor performance, it is not suitable for mixed use. Even if the physical properties of the drug solution are good after mixing, it is necessary to carry out a small-scale test first to see if it is prone to damage and phytotoxicity, and then use it in a large area. For example, foliar fertilizers containing boric acid, ferrous sulfate and the like are mostly acidic, while copper preparations such as copper hydroxide are alkaline. If mixed, it is easy to react and affect each other.
Second, the order of mixing foliar fertilizers and pesticides should pay attention to
Generally, a sufficient amount of water is first prepared with a single dose of the drug solution, and then the other solution is diluted with the solution; instead, the two single agents may not be mixed first, and then diluted with water to avoid adverse reactions, resulting in effective Destruction of ingredients and deterioration of physical properties.
When foliar fertilizer is mixed, the order of foliar fertilizer and pesticide is usually: foliar fertilizer, wettable powder, suspending agent, water agent, and emulsifiable oil are added in sequence, and each one is added, then fully stirred and mixed, and then the next one is added. .
Third, pay attention to the use of water when mixing
Water has a great influence on the liquid medicine, and the pH and ion concentration of the water will affect the effect. It is better to use medicinal water with neutral water with low ion concentration, such as clean rain water and river water.
Fourth, pay attention to the current use
Although the drug solution has no adverse reaction at the time of the formulation, it is easy to produce a slow reaction for a long time, which may result in loss of efficacy or susceptibility to phytotoxicity. If some pesticides are stable under weak alkaline conditions, they should also be used immediately. If they are placed for a long time, they will be ineffective.
Fifth, pay attention to acidity and alkalinity.
It is also necessary to test whether flocculation, precipitation or discoloration occurs, and bubbles are generated after mixing. If the liquid has poor performance, it is not suitable for mixed use. Even if the physical properties of the drug solution are good after mixing, it is necessary to carry out a small-scale test first to see if it is prone to damage and phytotoxicity, and then use it in a large area.
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