Which method is commonly used to manage pests through biological means?

• A. Using genetically modified crops
• B. Introducing natural predators to control pest populations
• C. Increasing pesticide application rates
• D. Using synthetic pheromones to confuse pests

Answer: (B)

The correct method for managing pests through biological means is the introduction of natural predators to control pest populations. This approach leverages the natural relationships within ecosystems to manage pest species without relying on chemical interventions. By introducing organisms that naturally feed on or otherwise control pest populations, this method can effectively reduce pest numbers while maintaining ecological balance.

For instance, ladybugs are often introduced in gardens and agricultural settings to control aphid populations. This strategy not only helps manage pests but also encourages biodiversity, as it promotes the presence of other beneficial organisms in the environment.

Using genetically modified crops usually involves altering plant traits to make them resistant to pests or diseases, which is more of a genetic approach rather than a strictly biological one. Increasing pesticide application rates is a chemical control method that can lead to adverse environmental effects and pest resistance. Likewise, using synthetic pheromones aims to disrupt pest mating patterns or lure them into traps, which while innovative, falls under chemical control strategies rather than biological methods.