In order to improve work efficiency, many people use pesticides together with foliar fertilizers . It is easy to cause phytotoxicity and other diseases will occur. Of course, it is not said that pesticides and foliar fertilizers cannot be mixed. Three major considerations for the mixing of pesticides and foliar fertilizers:
First, to ensure the stability of the foliar fertilizer and pesticides after mixing.

Some foliar fertilizers may chemically or physically react with pesticides, affecting the effectiveness of fertilizers and even causing phytotoxicity. 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 it is mixed, it is easy to react and affect each other. Therefore, when foliar fertilizer is mixed with pesticides , the first thing to pay attention to is 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.
Second, pay attention to the order of foliar fertilizer and pesticides when mixed.

When the vegetable farmer dispenses a sufficient amount of water, a single dose of the liquid is first dispensed, and the other solution is diluted with the liquid. It is not possible to mix two single agents first and then dilute with water to avoid adverse reactions. When mixed, the order of foliar fertilizer and pesticide added to water 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, the liquid should be used now.

Some foliar fertilizers and pesticides have no adverse reactions when they are just well-matched, but they are prone to slow reactions over a long period of time, which can cause the loss of fertilizer and medicine and even cause harmful effects.
Different kinds of fertilizers and pesticides have different properties. If the mixture is unreasonable, it will affect the effect of using fertilizers and even cause harmful effects.

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