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Can plant growth regulators be used together with fungicides? 

Date: 2024-06-28 14:29:57
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Can plant growth regulators be used together with fungicides? 

Plant growth regulators and fungicides can be used together in some cases, but attention should be paid to the interaction and safety between the agents.

The mixing of plant growth regulators and fungicides depends on the mechanism of action of the agents, systemic conductivity, complementarity of the objects of control, and whether antagonism will occur after mixing.
In some cases, such as to achieve the purpose of disease prevention or enhance plant disease resistance, promote plant growth or cultivate strong seedlings, plant growth regulators can be mixed with fungicides. For example, auxin 2,4-D is mixed with fungicides for controlling gray mold and then applied to tomato buds, or when whiteflies or aphids and downy mildew, gray mold, etc. occur simultaneously on cucumbers cultivated in protected areas, the agents for controlling whiteflies or aphids are mixed with agents for controlling downy mildew. 

However, not all plant growth regulators and fungicides can be safely mixed.
Some plant growth regulators, such as paclobutrazol, chlormequat, etc., are generally not recommended to be mixed with fungicides to avoid side effects. Before use, it is recommended to conduct a mixing test to ensure that there are no adverse reactions before mixing, and follow the principle of "strictly separate drugs" to avoid reactions after mixing and affect the effect.

In addition, attention should be paid to the compatibility of drugs when mixed to avoid unpredictable side effects. Test before use, and steadily increase the dosage of the drug, pay attention to the condition of the plant, and adjust the dosage and time of the drug in time to ensure safety and effectiveness.

In summary, the mixing of plant growth regulators and fungicides requires caution, ensure that the drug formula and usage are understood, and slowly try it at a reasonable dose, and make appropriate adjustments based on the results of the trial.
 
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