Porter weeds Have Holes With Sawdust Above Them

Question From: M. Templeton - Naples, Florida, United States
Q: I have 2 Blue Porterweeds. There are many areas with a sawdust type material and a hole underneath it. Could you please tell me what pest might be causing this and how we could eliminate them? Ive searched the internet with no success. thank you

A: Sorry Mike, I live in Michigan and am not familiar with Porterweeds, much less the pest thats chewing on them. I googled bugs that chew wood in Florida and found several. I'd also ask at your local independent garden center or nursery. A certified arborist could help you. To find one in your area go to www.tcia.org and enter your zip code. Best And Happy Yardening, Nancy