(1) No adverse chemical and physical changes should occur after pesticides are mixed. If the medicament is not decomposed after mixing, the emulsifiable concentrate will not be destroyed, the suspension will not produce flocculation or a large amount of precipitation, and can be mixed and used.
(2) It is necessary to clarify the purpose of the mixed use of pesticides, and they should not be mixed for mixed use. Mixed use of pesticides should achieve the purpose of synergies, concurrent cures, and expansion of prevention and control. If this cannot be achieved, it should not be mixed. Otherwise, it will cause waste, fail to receive the desired results, and even cause phytotoxicity.
(3) After the drug is mixed, the drug efficacy of the mixed drug solution should be improved, and at least the efficacy should not be reduced, that is, the compounding effect must be increased.
(4) After the agents are mixed, the acute toxicity of the mixture cannot generally be higher than their original toxicity, that is, they cannot be poisoned.
(5) The mixed liquid medicine (meal powder) after mixing should not cause harm to the crops. If there is phytotoxicity, they cannot be mixed with each other.
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