Are borers a major problem for small prairie plantings? I have a small (1000 sq ft) 3yr old prairie planted with a mixture of forbs and grasses. This year I noticed 4 plants,
cupplant(silphium perfoliatum), cardinal flower(lobelia cardinalis), Queen of the prairie(filipendula rubra),and
pale purple coneflower(echinacea pallida) all with a borer in the stem. I leave the plants standing over winter and then mow them all down in spring.I have not done a burn yet. Is there any action I can take to minimze the damage, or are borers just part of the prairie eco-system? Any help would be greatly appreciated. Thanks.