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Forest Health News

Browse up-to-date bulletins on the causes of branch flagging, insect defoliators, exotic insect and disease pests, conifer problems and current disease issues.

In This Section

Forest Health Alert: Finding EAB in Winter (pdf, 971 KB)

Look for bark blonding on ash trees this winter. It could be a sign of emerald ash borers.

Missouri Forest Health Update, November 2017 (pdf, 1 MB)

Topics in this issue include thousand cankers disease, emerald ash borer, rapid white oak mortality, oak wilt, leaf scorch, leaf spot, Japanese beetles, gypsy moth, and southern pine beetle.

Forest Health Alert: Japanese Beetles (pdf, 1 MB)

These insects can eat all the leaves off your tree. Learn what you can do to stop them.

Missouri Forest Health Update, November 2016 (pdf, 1 MB)

Topics in this issue include thousand cankers disease, emerald ash borer, rapid white oak mortality, Japanese beetles, gypsy moth, fall webworm, and jumping oak gall.

Forest Health Alert: Jumping Oak Gall (pdf, 716 KB)

This tiny native wasp can cause the leaves of white oaks to turn brown. Learn to identify jumping oak gall.

Forest Health Alert: Hypoxylon Canker (pdf, 2 MB)

This disease of oaks and other hardwoods is common after drought. Learn to identify and respond to it.

Forest Health Alert: Oak Wilt (pdf, 2 MB)

This disease of oaks is easily spread in the spring. Learn to identify and prevent it.

Forest Health Alert: Urban Tree Decline (pdf, 2 MB)

Drought and other stresses work together to cause Missouri's urban trees to lose health and vigor over time. Learn to identify, respond to, and prevent urban tree decline.