I keep finding a sawdust looking material at the base of some of my perennials and can't identify it. It results in the weakening of the plant stem to the point of complete collapse, the root system seems affected also. Can anyone help me with identifying it? thanks....
What plants are affected? Sawdust is often an indication of borer activity. Many of these pests are very host specific (like the "Mountain Pine Beetle" for instance). Check with your local or state Ag department for specific risks and cures (maybe). Ralph
Sorry Sue, my comments were directed towards woody stemmed perennial shrubs and trees. I've no idea what you might be seeing on (or around) your coneflower and sweet william. Ralph
Here's a not so great pic of the "sawdust" under a blackeyed susan. Does this help? Thanks for your help. -Sue
