Which of the following is considered a method of chemical control for cockroaches?

Growth regulators are considered a method of chemical control for cockroaches because they disrupt the normal development and reproductive cycle of the pests. These substances, often referred to as insect growth regulators (IGRs), mimic natural hormones and can interfere with molting, leading to the prevention of immature cockroaches from developing into adults. This disrupts the population growth of cockroaches, ultimately reducing their numbers over time.

On the other hand, high heat application is a physical control method that effectively kills cockroaches through temperature exposure, while vacuuming serves as a mechanical method to physically remove pests and their eggs. Physical traps capture and hold cockroaches without impacting their biological processes directly. Therefore, selecting growth regulators in this context highlights the specific focus on chemical control mechanisms within pest management strategies.