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Tag: stem borers; Penthesilea

Blue Porterweed, Stachytarpheta urticifolia, With Piles of “Dirt” Along Stems

These piles of dirt are accumulated frass and silk webbing from a caterpillar, [Pyralidae: Penthesilea difficilis],  tunneling inside the stem (photo with flower and frass by Stephen Brown, UF|IFAS Extension Lee Co.)There isn’t too much one can do… Read More