When should a PCA recommend the use of an alternative pest control method?

Recommending the use of an alternative pest control method is appropriate when chemical control poses potential harm to the environment or human health. This is a key aspect of a PCA's responsibilities, as they must prioritize safety and sustainability. The use of pesticides can lead to negative impacts on non-target organisms, beneficial insects, ground and surface waters, and overall ecosystem health. Therefore, if a PCA identifies risks associated with pesticide use, including potential health hazards for humans, animals, or the environment, they should advocate for alternative methods that can effectively manage pest populations without causing harm.

This approach aligns with integrated pest management (IPM) principles, which emphasize using a combination of strategies—cultural, mechanical, biological, and chemical—to manage pests in an environmentally sensitive manner. Factors such as eco-friendliness and human safety must take precedence, which is why the second choice is the right answer in this context.