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UOG Horizons: Knowledge for Life - Nature’s free, eco-friendly roach solution
UOG Horizons: Knowledge for Life - Nature’s free, eco-friendly roach solution
UOG Horizons: Knowledge for Life - Nature’s free, eco-friendly roach solution
1/6/2026
Here in Guam, two kinds of cockroaches often invite themselves into our homes: the large American cockroach and the smaller German cockroach. No matter which one you meet, the reaction is usually the same: “Ugh!” The smell they leave behind is awful, and sometimes it’s hard to understand how and why they still sneak in, even when we keep everything sealed and spotless.
If you’ve been waging war against these unwelcome guests, you might like to know that Lee Yudin, the former dean of UOG’s College of Natural & Applied Sciences, wrote an excellent fact sheet on how to manage them. You can find it in the UOG Land Grant Publications Library at https://www.uog.edu/publications/ceo.
But today’s story isn’t just about us fighting cockroaches - it’s about a tiny ally who does the job for us, even before baby cockroaches see the light of day. Meet our blue-eyed, beautiful friend, the ensign wasp (Evania appendigaster).