Know what's attacking your Park City trees.
Warm winters, short growing seasons, drought stress, and high-altitude insect pressure make pest timing critical across Summit and Wasatch Counties.
Tree pests move fast, but the right answer still starts with inspection.
Aphids, mites, scale, borers, beetles, and tip weevil all leave different clues. These pages help you compare symptoms, seasons, host trees, and treatment windows before you call.
Symptoms, timing, and treatment windows.
These are the pests Greenleaf sees most often in Park City aspens, spruce, pine, willow, maple, and ornamental trees.
Aphids
Aphids suck sap from Park City deciduous trees, causing leaf curling, discoloration, sticky honeydew, and reduced vigor.
Season: Spring and summer
Bark Beetles
Bark beetles can kill vulnerable conifers quickly, especially trees stressed by age, drought, crowding, mechanical damage, or fire.
Season: Preventive treatments before infestation
Borer
Borers make holes in trunks and branches and can girdle or kill stressed Park City trees.
Season: Preventive programs before heavy damage
Mites
Mites are tiny spider-like pests that damage foliage and needles during hot, dry Park City weather.
Season: Hot, dry summer periods
Scale
Scale insects attack trunks and limbs, drawing sap and causing branch dieback when infestations are not controlled.
Season: Spring and summer
Tip Weevil
Tip weevil attacks the leader and new growth of spruce and pine trees, often causing visible dieback at the top of the tree.
Season: Spring and fall prevention