Which methods are considered non-chemical pest control strategies?

The selection of cultural practices, biological controls, and physical barriers as non-chemical pest control strategies is rooted in sustainable and environmentally friendly approaches to managing pests. Cultural practices involve changing farming or gardening habits to make the environment less conducive to pests; for example, rotating crops or optimizing planting times can diminish pest outbreaks.

Biological controls utilize natural predators or parasites to reduce pest populations, leveraging the existing ecosystem rather than introducing chemicals. This method promotes biodiversity and reduces reliance on synthetic pesticides.

Physical barriers include methods like nets, row covers, and traps that physically prevent pests from reaching the crops or plants, effectively keeping them away without harmful substances.

These methods emphasize sustainability and ecological balance, which are critical components of integrated pest management. The other options involve either chemical responses or strategies that don't align with the non-chemical definition.