Lile from Independence, Ky writes
I live in an area where a 17 year brood of cicadas is expected to emerge mid May and last through June. Will there emergence impact the vapor barrier of pre-emergents like prodiamine?
We are not aware of any studies that have been performed to see how the emergence of sub surface insects such as cicadas would impact a pre emergent barrier with Prodiamine 65 over time. While any disturbance in the barrier can create a weak spot, we couldn't determine how greatly or minimally the residual would be impacted. You may find a follow up application 8 weeks after your first spring treatment of the pre emergent will help reinforce the barrier and extend its life further into the growing season.
Answer last updated on: 03/01/2021
