Which is an undesirable characteristic of a pesticide storage area?

A pesticide storage area should not be well-lighted by direct sunlight because excessive light and heat can degrade the effectiveness of many pesticides, potentially leading to a decrease in their potency or causing them to break down chemically. These environmental factors can affect the stability of the active ingredients in pesticides, which in turn can compromise their efficacy when applied.

In a well-maintained storage area, the focus should be on keeping the environment dry, cool, and stable while also ensuring safety by securing the area and providing appropriate signage. This includes being away from children, pets, food, feed, and water sources, as well as being adequately labeled for safety.