Which of the following is NOT a benefit of using physical barriers in pest control?

Using physical barriers in pest control offers several advantages, including preventing insects from gaining access to plants, protecting vulnerable young plants from damage, and reducing reliance on chemical controls.

Preventing insect access is a fundamental benefit, as physical barriers like row covers or nets can effectively block pests from reaching plants, thereby reducing potential infestations. Similarly, protecting young plants is crucial, as they are often more susceptible to pests. Barriers can safeguard these plants during their vulnerable stages.

Additionally, employing physical barriers can lead to a decrease in the need for chemical pesticide applications. By minimizing pest encounters early, the ecosystem can maintain a balance with fewer interventions required.

The option stating "Completely eliminating all pests" is misleading because while physical barriers can significantly reduce pest populations and potential damage, they cannot assure total eradication of all pest species, especially those that are persistent or capable of bypassing physical controls. Thus, this option is not a benefit of using physical barriers.