Diseases and Pests in Massachusetts (MA)

Elm Leafminer

Elm leaf miner is a native pest that feeds on the tissues in between the outer layers of elm leaves, causing browning and leaf drop. More…

European Elm Scale

European elm scale, Gossyparia spuria, is a soft scale insect that attacks a variety of elm trees as well as hackberry species. Heavy infestations may kill weakened trees and cause branch dieback in healthy trees. More…

European Pine Sawfly

European pine sawfly, Neodiprion sertifer, is an introduced pest that was first found in New Jersey in 1925. It affects a variety of pine species by feeding on the old needles in early spring. More…

Gypsy Moth

Gypsy moth larvae defoliate trees leaving them weakened and vulnerable to secondary fungal and insect invaders. Gypsy moth will affect trees in natural settings, forest plantations, and urban environments, often defoliating thousands of trees in a single outbreak. More…

Hemlock Elongate Scale

Hemlock elongate scale pierces the underside of the needle with its mouthparts and removes fluids from the needle. Trees that are severely infested will exhibit needle yellowing or dropping, thinning canopy, and eventual death. More…

Holly Leafminer

Holly leaf miner damages a number of holly varieties by feeding between the upper and lower surface of the leaf tissue. More…

Japanese Beetle (Lawn)

The Japanese beetle spends much of its life in the soil underneath your lawn as a grub where it feeds on lawn roots. Where their numbers are large, turf grass can be killed. More…

Japanese Beetle (Tree)

Japanese beetles are skeletonizers, which mean they eat the “meat” of leaves, leaving only the veins behind. They also feed on both flowers and fruit. More…

Lecanium Scale

Lecanium scale represents a group of common soft scales that infest a wide range of tree species. They attach themselves to the leaves and twigs of trees and shrubs and feed on the plant nutrients. More…

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