Diseases and Pests in New Jersey (NJ)

Aphids

Aphids are one of the most common insects found on trees and shrubs. There are more than 400 species of aphids that feed on numerous hosts, creating sticky honeydew that can coat any surface underneath the tree or plant that is infested. More…

Apple Scab

Apple scab is a foliar disease that causes infected plants to lose their leaves prematurely. Although unsightly it is rarely a cause of tree death. More…

Ash Plant Bug

Ash plant bug is rarely a fatal insect infestation, however the curling and discoloration on the leaves can be disconcerting. More…

Bacterial Leaf Scorch

Bacterial leaf scorch causes rapid dieback in sections of valuable shade trees. Although not curable, the symptoms can be supressed using antibiotics. More…

Bagworms

Bagworms are destructive insects that attack many deciduous and evergreen trees and shrubs. More…

Birch Leafminer

Birch leafminer is the larval stage of a small “fly-like” wasp. The larvae feed between the epidermal layers of a leaf and are protected from predators and parasites by the leaf. More…

Bronze Birch Borer

Bronze birch borer is a native wood boring beetle that attacks birch trees that are stressed, e.g. by drought, soil compaction or insect feeding. More…

Calico Scale

Calico scales produce large amounts of honeydew in the spring which can coat tree leaves, branches, sidewalks, and cars More…

Chlorosis

Chlorosis is a common problem of urban trees. It is in these environments that trees struggle to make chlorophyll and threfore become yellow. More…

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