re: What can I do to prevent termites from being attracted to my mulched beds?

Not a chemical but research Diatomaceous Earth. I have not used it for termites but I have for other insects and it has always worked.

Uses for DE

"When diatomaceous earth is crushed to a specific size the microscopic outer shell of the silica particles becomes razor sharp. These particles cut open the outer layer of the termite causing its death. Control of termites is achieved in a totally non-toxic way. Because control is achieved through physical means and not chemical means, the termite cannot develop a resistance. While deadly to termites diatomaceous earth is perfectly harmless to humans and animals as it cannot penetrate elastic skin."