Damaged stinging nettle, artwork. Various views of a stinging nettle damaged by the weevil (Ceuthorhynchus pollinaris). At left are several enlarged views of sections of damaged stems and petioles (leaf stems). In spring, the female weevil makes holes in the stems with the mandibles located at the end of her rostrum. Her eggs are then laid inside the holes. Sections showing the eggs are at top left and centre left. The weevil also feeds on the leaves (centre right). At far right is an enlarged view of a larva inside the stem cavity.