Adelgid Imported pest often kills eastern or Canadian hemlock by feeding on needles and subsequent needle drop. Adult females are conspicuous because of white fluffy wax covering on twigs. Spider Mite Many types of spider mites infest both deciduous and evergreen landscape plants and are not readily visible without magnification. Look for early signs of stippling on needles and leaves, along with general discoloration. This moth larvae feeds on a number of plant species, but prefers wild cherry and ornamental fruit trees.
Caterpillars have one stripe down back and construct silken webs in branch forks.
Larvae bore into larger branches and trunk, causing exuding gummy areas. Dogwood Borer Native clearwing moths primarily attack dogwoods. Larval stage bores into trunk and larger limbs causing visible frass build-up in bark cracks. This is a fungal disease that slowly progresses from a foliar to a systemic infection and proves fatal to native dogwood species. Symptoms include brown necrotic areas along mid-veins, leaves held through winter, and water sprouts.