Biological control can include pheromones or juvenile hormones.

Biological control can include pheromones or juvenile hormones.

• A. The use of pheromones or juvenile hormones to control insects.
• B. Chemical fertilizers to deter pests.
• C. Repeated mowing to reduce pests.
• D. Irrigation scheduling.

Answer: (A)

Biological control includes tactics that use natural pest biology or signals rather than broad chemical pesticides. Pheromones are semiochemical signals that manipulate pest behavior, most commonly by mating disruption, which reduces reproduction. Juvenile hormones (or their synthetic analogs) act as insect growth regulators, interfering with development so pests don’t reach maturity or reproduce. Together, these approaches use the pest’s own biology to control populations, making them classic biological control tools. The other options are cultural or agronomic practices—fertilizers influence plant nutrition, mowing changes habitat, and irrigation scheduling affects moisture but does not directly employ biological control methods.

Biological control includes tactics that use natural pest biology or signals rather than broad chemical pesticides. Pheromones are semiochemical signals that manipulate pest behavior, most commonly by mating disruption, which reduces reproduction. Juvenile hormones (or their synthetic analogs) act as insect growth regulators, interfering with development so pests don’t reach maturity or reproduce. Together, these approaches use the pest’s own biology to control populations, making them classic biological control tools. The other options are cultural or agronomic practices—fertilizers influence plant nutrition, mowing changes habitat, and irrigation scheduling affects moisture but does not directly employ biological control methods.