About Trioza centranthi (Vallot, 1829)
This section describes the galls induced by Trioza centranthi (Vallot, 1829). On infected plants, the leaf at the tip of the shoot is broader than usual, with swollen, upward-curled leaf edges. Flowers may also become infected, developing into a tangled, leafy mass in a condition called phyllanthy. Plant species that develop these galls include Centranthus angustifolius, Centranthus calcitrapa, red valerian (Centranthus ruber), Fedia cornucopiae, Valerianella carinata, Valerianella coronata, Valerianella dentata, common cornsalad (Valerianella locusta), and Valerianella rimosa. Trioza centranthi is distributed across Europe, ranging from Great Britain and France in the west to Ukraine in the east.
