Lowering the humidity of stored grains and other food products to reduce damage from mold is an example of which type of pest management method?

Lowering the humidity of stored grains and other food products to reduce damage from mold is an instance of physical/environmental modification because it involves altering the environment to make it less conducive to pest-related issues. By controlling the humidity levels, you create conditions that are unfavorable for mold growth, thereby protecting the integrity of the stored food.

This method does not involve any chemical treatments or regulatory measures, which distinguishes it from other forms of pest management. Mechanical methods often involve physical barriers or tools to remove pests, and biological methods utilize natural predators or organisms to control pest populations. Regulatory pest control typically involves laws and regulations to manage or prevent pest issues. In this scenario, since the approach is focused on modifying environmental factors, adjusting humidity falls squarely into the category of physical/environmental modification.