Jeff from Zanesville, Oh writes
It is not recommended to apply Merit 2F Insecticide during rain. Normally as long as an insecticide like Merit 2F has had at least 6 hours of dry time after it has been applied, then it is considered rain fast to most rain conditions that would come afterwards. If it rained as early as 4 hours after application you may need to reapply.
Answer last updated on: 03/29/2018
