Wood Destroying Organism (WDO) Home Inspection Practice Exam

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What is a key characteristic of fumigants in pest control?

Long-lasting residual action
No residual action
High mammalian toxicity
Low effectiveness against termites

The correct answer is: No residual action

Fumigants are a unique category of pest control agents that work by filling an area with gas or vapors designed to suffocate or poison pests. A key characteristic of fumigants is their lack of residual action, meaning that once the gas dissipates, it does not leave behind a lasting effect on surfaces or in the environment. This is advantageous in many cases, especially when the goal is to eradicate pests in a contained area without leaving chemical residues that could harm humans, pets, or beneficial insects once the treatment is complete. Given this characteristic, it's clear that fumigants are specifically designed to act in a short time frame and do not linger in the environment, making them distinct from other chemical pest control agents that might have a residual effect long after application. Understanding the transient nature of fumigants aids in selecting the appropriate pest control strategy and helps ensure safety and effectiveness in pest management practices.