Many people in the use of pesticides, fertilizers, herbicides, in order to save time, often use pesticides, fertilizers, herbicides mixed. Drug mixing should pay attention to science, before 

mixing should understand the chemical physical and chemical properties, efficacy characteristics, biological activity, etc., after field application test, finally can be used in a large area, can 

not be used indiscriminately. The following describes the basic principles of pesticide mixing.

1. there is no adverse chemical reaction between the mixed varieties (such as hydrolysis, alkali hydrolysis, acid hydrolysis or REDOX, etc.), to ensure normal efficacy or synergic effect, and 

does not affect the physical properties of the agent (such as emulsification, suspension rate, etc.). For example, most organic 2, phosphorus pesticides can not be mixed with Bordeaux 

liquid, stone sulfur mixture, etc., can not be mixed with wettable powder, soluble powder.

2. after the mixed use of different varieties, it will not cause drug damage to crops. For example, when organophosphorus pesticides are mixed with paspalum, it will cause harm to rice, 

and at the same time, it is mixed with Bordeaux liquid and stone sulfur mixture, which is easy to cause drug damage to crops.

3. After pesticide mixing, it will not increase toxicity and ensure safety for humans and animals.

4. Use it reasonably. Including the reasonable collocation between the species, such as the control of soybean field grass weeds, using only to catch the net, cover the grass can be 

prevented, and then using the mixture of the two, although it is not feasible from the stability of the agent, but it is not reasonable mixing and does not have a synergistic effect. 

Pesticide mixing is to save time and improve economic benefits, such as after the preparation of the mixture, the additional cost is very large, is not allowed.

5. pay attention to the antagonism between pesticide varieties, to ensure the effect of mixed use, such as bentazon and catch net mixed use due to antagonism and reduce the control 

effect on grass weeds.