kahjustab nii looduses kasvavaid kui ka aias kasvatatavaid kannikesi, kannikeste lehed paksenevad ebanormaalselt ja rulluvad üles, kahjustus aseglustab kasvu ja pidurdab õitsemist, a widely distributed, important and often persistent pest of wild and cultivated violet (Viola), infected plants become stunted and malformed, with flower production seriously affected if not entirely prevented, in severe cases, plants might eventually die