Granulate ASmbrosia Beetle
How do I determine if this is the precise insect that is killing my redbud tree? If it is as invasive as the North Carolina Cooperative Extension web site indicates, can a senior citizen have it removed at no cost? The tree is about 15 feet tall and 20 feet spread. The ornamental NC redbud was purchased fromValley View about 10 years ago. The tree has widespread pinholes on the trunk and branches and boring dust at the tree base. Tunnels of boring dust produce protruding spikes (boring dust) about 1/4 out from the bark.
You can send us photos of the whole tree, around the base, and holes in the trunk and branches so we can see what you may be dealing with. You did not mention the health of the tree.
Based on your description it is possible that this is what you may be dealing with.
Take a look at our website for photos and more information. This borer is attracted to stressed trees. In general, trees can be affected by drought, poor drainage, planting too deeply, poor soils, soil compaction, etc. These factors make the trees susceptible to secondary issues like borers. Insecticides are ineffective against beetles that have bored into the trees. If the tree declines and is on your property, you will have to remove it.