Can chemical fertilizers be mixed with pesticides?

Chemical fertilizer mixed with pesticide can not only provide nutrients for crops, but also prevent diseases, insects and weeds. It is a widely used technology in recent years. The benefits are:

① Improve drug efficacy. If 0.3~0.4 kg urea is added to sodium salt, the weeding effect can be significantly improved. This is because after adding chemical fertilizer, it can promote the absorption of sodium salt, thus improving the weed control effect;

(2) Improve fertilizer efficiency. For example, the mixture of prometryn and nitrogen fertilizer can improve the effect of nitrogen fertilizer.

③ Improve work efficiency. When nitrogen fertilizer is applied to early rice for the first time, it can be mixed with herbicide Fucaoxing, which can provide fertilizer and weed control. Although there are many advantages to the mixed use of fertilizers and pesticides, not all fertilizers and pesticides can be mixed, and whether they can be mixed should be based on two principles: first, do not reduce fertilizer efficiency and efficacy. For example, ammonium nitrogen fertilizer or water-soluble phosphorus fertilizer cannot be mixed with alkaline pesticides such as Bordeaux mixture, otherwise the effective components of fertilizer will be reduced; second, after mixing, it is harmless to crops. Usually highly selective herbicides, such as phenoxy acid herbicides, when mixed with chemical fertilizers, not only do not cause harm to crops, but also can improve the herbicidal effect.

The following fertilizers and pesticides can be mixed:

Mancozeb can be mixed with urea, magnesium sulfate and ammonium sulfate;

(2) Herbicides such as 2M-4Cl, Fluorox, Nongdeshi, Fucao Star and Butachlor can be mixed with urea or compound fertilizer;

(3) Plant growth regulators gibberellin, triacontanol and polyharvest can be sprayed together with urea, potassium dihydrogen phosphate and boric acid. When fertilizer and pesticide are mixed, must pay attention to mix method. If both fertilizer and pesticide are solid and applied to the soil, they can be mixed directly together, spread on the ground, and then tilled. If the pesticide is wettable powder, spray wet the fertilizer surface with a small amount of water, then add the powder and mix well. If the pesticide is emulsifiable or aqueous, it can be poured directly on the fertilizer and mixed. If it is too wet, a small amount of dry fine soil can be added. If foliar spraying is required, emulsifiable concentrate, aqueous solution or wettable powder pesticide can be mixed with chemical fertilizer and applied after solution.