https://extension.illinois.edu/insects/pine-bark-adelgids
Pine Bark Adelgids | Insects | Illinois Extension | UIUC
Pine bark adlegids (Pineus strobi) are often referred to as bark aphids. Of all the pines in the Midwest, eastern white pine seems to be the one most often...
pine barkillinois extensionadelgidsinsectsuiuc
https://ipm.cahnr.uconn.edu/spruce-gall-adelgids/
Spruce Gall Adelgids | Integrated Pest Management | College of Agriculture, Health and Natural...
Aug 23, 2021 - Most spruce trees are damaged by one of two species of gall-forming adelgids (aphids); the Eastern spruce gall adelgid, Adelges abietis, and the Cooley spru ...
integrated pest managementcollege of agriculture