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Steve from Myrtle Beach, Sc writes,

If Talstar is sprayed over Termidor, does it deactivate the Termidor?

After my pc guy wrapped my house with Termidor for ants, I was told that I wasn't supposed to spray Talstar (mosquito treatment) on top of the Termidor because it would render the Termidor treatment useless. Why would this happen?


Termidor SC is a non-repellent insecticide. This means that ants and other insects cannot tell that it is there and they will readily walk over treated areas. Termidor SC also has a delayed reaction time and a transfer effect which allows the ants time to get back to the colony and spread it around before they succumb to the effects of the product. Talstar P on the other hand is synthetic pyrethroid which many sensitive insects such as ants can detect. Ants may avoid the areas treated with Talstar and those ants that do cross over treated areas are the only ones that will be killed by the product. Talstar P does not have a transfer effect so it will not be transferred back to the colony. While the Termidor SC will not actually be deactivated by Talstar P, it will be much less effective if it is over-sprayed with Talstar P. You can spray Talstar P on your trees, bushes and lawn for mosquito control as long as you are not actually overlapping the areas where Termidor SC was applied.

Answer last updated on: 04/10/2012

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