What is a common consequence of overusing the same pesticide type in turf?

• A. Increased yield.
• B. Immediate pest eradication.
• C. Pest resistance and reduced efficacy.
• D. Enhanced soil fertility.

Answer: (C)

Repeating the same pesticide type creates selection pressure on the pest population, so individuals that have or acquire resistance survive treatments and reproduce. Over time, the population becomes less susceptible, and the pesticide loses its effectiveness. This is why rotating products with different modes of action and combining chemical control with non-chemical strategies helps maintain turf health and keeps pests in check.

Other options don’t fit because a constant overuse of one product doesn’t reliably boost yield, isn’t a lasting solution that eradicates pests, and pesticides don’t inherently improve soil fertility.