Journeymen's Guide
This area contains resources applicable to skilled labor and trades:
• Electrical resources
• Plumbing resources
• Masonry resources
• Carpentry resources
• HVAC resources
Treating Black Walnuts with Insecticides for Spotted Lanternfly Control
PennState Extension
Recommendations for safe pesticide applications to control spotted lanternfly infestations.
Do Lichens Cause Harm to Trees?
PennState Extension
Lichens are often thought to be a pest or disease to trees and shrubs.
Why are My Spruce Trees Dying?
PennState Extension
Learn how to identify types of spruce trees, symptoms of two common fungal diseases, and what if any treatments are available.
White Pine Weevil
PennState Extension
The white pine weevil is considered the most destructive insect pest of eastern white pine in North America.
Western Conifer Seed Bug
PennState Extension
The western conifer seed bug feeds on Douglas-fir seeds and other species of pine. This bug can also become a nuisance to homeowners in the fall.
Tuliptree Scale
PennState Extension
The tuliptree scale is a pest of yellow poplar, or tuliptree, magnolia, and linden. This soft scale insect is so prolific that it can cover twigs and branches.
Spruce Spider Mite
PennState Extension
The spruce spider mite attacks spruce, arborvitae, juniper, hemlock, pine, Douglas-fir, and occasionally other conifers.
Fall Cankerworm
PennState Extension
The fall cankerworm is a native pest of hardwood trees in North America. It causes some defoliation in the forest every year, with larger outbreaks occasionally.
Elongate Hemlock Scale
PennState Extension
The elongate hemlock scale, sometimes known as the fiorinia scale, is a serious armored scale insect pest on ornamental and forest hemlock trees in Pennsylvania.
Elm Spanworm
PennState Extension
The elm spanworm is a serious defoliator of hardwood shade and forest trees in the eastern United States.
Eastern Tent Caterpillar
PennState Extension
The eastern tent caterpillar has been observed in the United States since 1646. Outbreaks frequently occur at eight to ten year intervals.
Oriental Bittersweet
PennState Extension
Oriental bittersweet is a non-native woody, perennial vine that covers and kills native plants by blocking sunlight, weighing the plants down, and girdling stems and trunks.
Mile-a-minute
PennState Extension
Mile-a-minute is an invasive, noxious weed from eastern Asia that is rapidly colonizing non-crop areas in Pennsylvania and surrounding states.
Hemlock Woolly Adelgid (HWA)
PennState Extension
Hemlock woolly adelgid is a destructive, introduced pest of forest and ornamental hemlock trees.
Emerald Ash Borer
PennState Extension
Emerald Ash Borer (EAB) is a destructive, introduced insect of North American ash trees. It has been the cause of widespread ash tree decline and mortality throughout northeastern North America.
