Oak leaf samples have been arriving in the Plant Disease Clinic showing symptoms of tatters. Tatters on hackberry has also been observed. Counties reporting tatters include Allamakee, Benton, Dubuque, Grundy, Johnson, Muscatine, and Poweshiek.
Damage from tatters appears at the time of leaf emergence. Affected leaves have reduced interveinal tissue, giving them a lacy or tattered appearance.