What are natural barriers that can help prevent pests?

Natural barriers to pest prevention effectively utilize certain plants that possess properties to deter insects, making them a sustainable option in pest control practices. For instance, marigolds release compounds that can repel various types of pests while possibly attracting beneficial insects, such as pollinators or natural predators of harmful pests. This dual role supports both pest management and ecological balance.

On the other hand, the other options do not function as natural barriers in the same way. Heavy metal panels, plastic sheets, and wooden fences lack the organic pest-repelling properties that plants like marigolds inherently possess. While these materials can offer some form of physical barrier, they do not provide the additional ecological benefits or natural repellency that plants can offer in pest control strategies.