Diseases and Pests in Minnesota (MN)

Diplodia Shoot (Tip) Blight

Diplodia tip blight (formerly known as Sphaeropsis tip blight) is a fungal disease that kills the tips of the branches of pines, and less frequently spruce and firs. More…

Eastern Tent Caterpillar

In late spring and early summer, the eastern tent caterpillar creates an unsightly nest or tent in the crotch of branches. The feeding of the larvae in late spring and early summer strips the foliage from trees. More…

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…

Emerald Ash Borer

Emerald ash borer (EAB) is an invasive wood boring beetle from Asia that is predicted to infest all unprotected ash trees in the United States and Canada over the next 20 years. 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…

Honeylocust Plant Bug

Honeylocust plant bugs injure the tree by feeding on the sap, which results in distorted and deformed leaves. More…

Honeylocust Spider Mite

The honeylocust spider mite is a warm season mite that causes a bronzing discoloration on honeylocust trees by feeding on the underside of the leaf surface. 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…

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