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Kurt writes

How long does it take for Demand CS to kill carpenter bees?

It says this is good for removing carpenter bees. How long does it take after contact to kill a carpenter bee?


When using Demand CS it can take minutes to hours to kill carpenter bees. The active ingredient needs time to work through the follicle of the insect to the central nervous system. You can spray surfaces they would land on to help prevent new holes, and treat inside existing holes for larvae with dusts like Delta Dust. You can also review the bet methods for treating carpenter bees in our Carpenter Bee Control Guide

Answer last updated on: 03/31/2021

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