TL;DR
A residual insecticide is a treatment formulated to remain active on surfaces for weeks to months after application, killing pests that walk across it long after the spray has dried. Microencapsulated and wettable-powder formulations extend life on porous block and mulch, while baseboard and perimeter band sprays form the backbone of quarterly pest service.
What it means
A residual insecticide is a treatment formulated to remain active on surfaces for weeks to months after application, killing pests that walk across it long after the spray has dried. Microencapsulated and wettable-powder formulations extend life on porous block and mulch, while baseboard and perimeter band sprays form the backbone of quarterly pest service. Sunlight, rain, and alkaline surfaces shorten effectiveness, which is why exterior treatments are reapplied seasonally.
Where it sits in the glossary
Residual insecticide is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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