True or False: A secondary pest is well controlled by natural enemies when no broad-spectrum pesticides are in use and can cause serious economic damage with the treatment of the key pest.

A secondary pest is typically one that does not usually cause significant harm under normal conditions but can become problematic when the population of the main pest is controlled, often through the application of broad-spectrum pesticides. When such chemicals are applied, they can inadvertently eliminate or reduce the population of natural enemies that keep secondary pests in check.

Thus, if broad-spectrum pesticides are not being applied, natural enemies of these secondary pests can thrive, effectively keeping their populations under control. However, when a primary pest is treated, especially with those broad-spectrum products, the resulting reduction in natural enemy populations can allow the secondary pest to proliferate, sometimes leading to economic damage.

Therefore, the statement is true, as it highlights that natural enemies of secondary pests are able to manage those pests effectively when broad-spectrum pesticides are absent. Yet, when treatments are made for the main pest, it can create an environment conducive to the secondary pest's outbreak, ultimately leading to economic consequences.