In agriculture, what is a common outcome of effective biological pest control?

Effective biological pest control focuses on using natural organisms to manage pest populations, thereby promoting ecological balance. This approach often leads to reduced pest populations as biological control agents, such as predators, parasitoids, or pathogens, target and suppress pest species.

The success of biological control methods contributes to healthier crops and minimizes the reliance on synthetic pesticides, which can have detrimental effects on the environment and human health. Subsequently, with lower pest numbers, farmers may observe improved crop yields and quality, reinforcing the benefits of integrating biological pest control into agricultural practices.

This outcome contrasts with the other options, which do not align with the goals and results of biological pest control and may indicate adverse effects rather than benefits. Higher pesticide usage and increased fertilizer dependency could imply a reliance on chemical solutions, while more frequent irrigations might suggest improper management practices rather than the efficacy of biological controls.