What is a non-chemical method for pest control?

A non-chemical method for pest control focuses on physical or biological measures rather than the application of synthetic or natural chemical products. The response that highlights physical barriers, like row covers or traps, is correct because these methods physically prevent pests from accessing plants or catching them without introducing chemicals into the environment.

Using products like pheromones to attract pests involves a strategy that may still fall under chemical pest control, even though pheromones are natural substances. This approach is primarily aimed at monitoring or disrupting pest behavior but does not qualify as a non-chemical method.

Utilizing insecticides to treat affected plants directly applies chemical solutions to the problem, disregarding non-chemical alternatives entirely. Similarly, creating insecticidal soaps at home, although potentially made from natural ingredients, still constitutes a chemical solution, as it involves applying substances specifically designed to kill insects.

Therefore, employing physical barriers effectively aligns with the principles of non-chemical pest control, making it a preferred and environmentally friendly option.