(Homoptera: Aphididae)
Issue No. 357
H. A. Denmark
March/April, 1993
Introduction
All Pemphigus spp. form galls on Populus spp. The galls are unsightly, but do little damage to the tree. Several Populus spp. have been introduced into Florida. In the 1960’s, the forest industry in Florida was interested in developing cottonwoods for pulpwood production and manufacturing of crates. The Division of Forestry, Florida Department of Agriculture and Consumer Services grew and distributed P. deltoides (eastern cottonwood) as shade trees for a short time in the 1960’s. Some trees are found today in the Florida Panhandle on flood plains. It is not uncommon to find galls on these and other cottonwoods in Florida.