Treehopper injury is a problem that has given many fruit growers in Utah some concern during recent years. These people have observed that their young fruit trees and the twigs and smaller branches of older trees have been attacked during the autumn of each year in a manner that produced numerous cuts which later formed scars. The trees frequently became unthrifty, and more or less deformed and stunted, as a result of these annual attacks.
The investigation reported in this publication was made for the purpose of ascertaining the present status of the treehopper situation in Utah orchards.
Sorenson, Charles J., "Bulletin No. 206 - Treehopper Injury in Utah Orchards" (1928). UAES Bulletins. Paper 178.