What do most termite baits contain?

Most termite baits are designed to interfere with the normal growth and development of termites, which is why they primarily contain Insect Growth Regulators (IGRs). IGRs work by disrupting the hormonal processes within insects, inhibiting their ability to grow, molt, or reproduce effectively. This method is particularly effective against termites because it targets their lifecycle, leading to population decline over time.

Using IGRs in termite baits offers a strategic advantage, as these substances can be slow-acting and will ultimately affect not only the termites that consume the bait but also those that come into contact with or ingest the affected individuals, facilitating a more comprehensive control of the colony. This method is often preferable in integrated pest management practices, as it reduces reliance on more traditional insecticides that might have broader ecological impacts or require multiple applications.

The other choices represent different classes of pesticides that are not typically found in termite baits. Chlorinated hydrocarbons are less commonly used due to their persistence in the environment and potential health risks. Pyrethroids and natural pyrethrins are more prevalent in broader insect control scenarios, focusing primarily on immediate knockdown and kill but lacking the targeted, developmental impact of IGRs in the context of termite bait systems.