Pear thirps - Study guides, Class notes & Summaries

Pear Thirps correct answers feeding causes leaves to be dwarfed, mottled yellow to green-brown, and distorted. Veins and petioles of leaves may develop blister-like scars. The crown of the host tree thins, resembling late frost damage. Damage may result in premature leaf drop in early fall. Life cycle: One generation per year Adults emerge from underground in April and begin feeding and laying eggs on foliage and flowers of host trees Adults may be present, in the Northeast, from March to Ma...