What condition is NOT detrimental to pesticide residual effectiveness?

Non-porous substrate surfaces do not negatively impact pesticide residual effectiveness because these surfaces prevent the absorption of the pesticide into the material. Pesticides applied to non-porous surfaces tend to remain on the surface longer, which can lead to better residual activity against pests. This is in contrast to porous surfaces, where absorption can lead to a more rapid loss of effectiveness as the pesticide penetrates into the material and becomes less available to control pests.

In contrast, exposure to moisture, direct sunlight, and extreme temperatures can all degrade pesticides. Moisture can lead to hydrolysis or wash off, reducing the concentration and effectiveness of the pesticide. Direct sunlight can cause photodegradation, breaking down the active ingredients, while extreme temperatures can either volatilize the chemicals or alter the pesticide properties, rendering them less effective. Understanding the impact of these various conditions on pesticide effectiveness is crucial for effective pest control strategies.