What type of baits act as insect growth regulators?

Insect growth regulators (IGRs) are substances that interfere with the normal growth and development of insects, particularly in their molting processes. These products mimic the natural hormones that insects use to regulate their growth, and as a result, they prevent the insects from successfully completing their life cycle. By disrupting the molting process, IGRs can lead to changes in behavior, reproduction, and ultimately, the demise of the insect population in a given area.

When considering the options, the choice indicating products that disrupt molting processes in colonies directly aligns with the fundamental mechanism of how insect growth regulators function. They are designed specifically to target developmental stages and ensure that the insects cannot transition from one growth stage to the next, ultimately leading to a decline in their population.

The other choices represent different types of pest control mechanisms. Stomach poisons with immediate effects typically kill insects quickly by affecting their digestive systems. Ingested toxicants that affect feeding primarily disrupt feeding habits but do not specifically target growth processes. Biotermiticides derived from natural organisms may work through various modes of action but are not specifically defined as IGRs. Thus, the option about products that disrupt molting processes is the correct one, as it accurately reflects the function of