Pesticides may be rendered ineffective on certain types of surfaces.

Pesticides may be rendered ineffective on certain types of surfaces.

• A. True
• B. False
• C. Only When Mixed With Water
• D. Only In Direct Sunlight

Answer: (A)

How well a pesticide works can depend a lot on the surface you apply it to. On porous or absorbent surfaces—like unfinished wood, concrete, fabric, or cardboard—the product can soak in or become trapped in the material, leaving less active ingredient on the surface where pests actually contact it. That reduces the amount available to kill pests and can make the treatment seem ineffective. On non-porous surfaces such as painted walls, tile, metal, or glass, the product tends to stay on the surface longer and form a residue that pests touch, which often improves effectiveness. Of course, formulation and label guidance matter, but the underlying idea is that surface type can meaningfully change how well a pesticide works.

How well a pesticide works can depend a lot on the surface you apply it to. On porous or absorbent surfaces—like unfinished wood, concrete, fabric, or cardboard—the product can soak in or become trapped in the material, leaving less active ingredient on the surface where pests actually contact it. That reduces the amount available to kill pests and can make the treatment seem ineffective. On non-porous surfaces such as painted walls, tile, metal, or glass, the product tends to stay on the surface longer and form a residue that pests touch, which often improves effectiveness. Of course, formulation and label guidance matter, but the underlying idea is that surface type can meaningfully change how well a pesticide works.