Diseases and Pests in New Jersey (NJ)

Pine Needle Scale

Pine needle scale is a small armored scale that feeds on the sugars contained in the needles of pines, spruce and fir. The insect attaches itself to the needle and produces a hard waxy shell to protect itself from predators and environmental conditions. More…

Spruce Spider Mite

Spruce spider mites (Oligonychus ununguis) are among the most devastating pests of common varieties of spruce trees and other conifers. This pest is most active in the cool spring and fall when it feeds on the needles of conifers, causing a bronze or rust coloration to the needles and potential leaf drop. More…

Sycamore Anthracnose

Sycamore anthracnose is a fungal disease (Gnomonia leptostyla) that affects Sycamores throughout the United States. The fungus attacks the buds and twigs, so infected trees often have “witches brooms”

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Two Lined Chestnut Borer

Two lined chestnut borer is an insect pest that attacks oaks, beech, hornbeam and chestnuts that are stressed by drought, compaction or other insects or diseases. More…

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