Science, reasonable mixed use of pesticides can expand the scope of prevention and treatment, improving the control effect, delaying disease, insects, weeds resistance, but also can play the role of promoting crop growth and development, give full play to the role of pesticide formulations. Pesticide mixed use principles include:
1, using two mixed pesticide cannot react; field mixed pesticide physical properties remain unchanged.
2, different pesticides mixture can improve the people, livestock, other beneficial organisms and natural hazards.
In 3, mixed pesticide varieties with different control modes of action and different control object.
4, different kinds of pesticide mixtures to improve efficacy; mixed pesticide use, agricultural and sideline products in pesticide residues should be lower than single agent.
5, pesticides mixture should be able to reduce the use of cost.
The existing pesticide mixes the main types are: pesticides, insecticides and adding synergist insecticides, fungicides, herbicides and fungicides and herbicides, insecticides and fungicides. But mix properly, may reduce the effect, chemical injury, which caused heavy damage. If mixed with alkaline materials easy decomposition failure medicament cannot with basic pesticides mixture; two or more kinds of medicament mixed chemical reactions do not mix; especially not to save time, labor, to a variety of disease and pest control or other objects randomly mixed medicament.

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