What is the common active ingredient found in many modern termiticides?

Fipronil is recognized as a common active ingredient in many modern termiticides due to its effectiveness in targeting termites and its relatively low toxicity to humans and pets compared to older chemicals. This synthetic insecticide disrupts the normal functioning of the termite's nervous system, ultimately leading to their death. Its broad-spectrum action and long residual effectiveness make it a preferred choice among pest control professionals.

The other options, while historically significant in pest control, are less commonly used specifically for termite management today. Chlorpyrifos, although effective, has faced regulatory scrutiny due to its potential environmental and health impacts. Carbaryl is more commonly used for a variety of pests but is not typically the go-to for termite control. Diazinon has also seen reductions in use due to similar regulatory concerns. Thus, Fipronil stands out as the leading choice among modern termiticides, reflecting a shift towards safer and more effective pest management solutions.