Diseases & Pests

What's Killing My Tree

Did you know that most tree problems result from a combination of factors? Insects and diseases often get the blame for killing trees, but factors like drought or construction damage are most likely the primary cause of a tree's death. These primary factors weaken a tree's defenses, making it more susceptible to attack by secondary invaders like insect borers and wood-decaying fungi. 

In This Section

Invasive Tree Pests

Invasive tree pests are insects and diseases that are not native to Missouri. These pests can easily travel in firewood. You can help protect our forests by purchasing firewood where you plan to burn it.

Missouri Invasive Forest Pest Plan (pdf, 492 KB)

The Missouri Invasive Forest Pest Plan provides an overarching framework for a coordinated response in Missouri to invasive forest insects and diseases.  Roles and responsibilities of cooperating agencies and response actions common to most invasive forest pests are defined.

Oak Decline in Missouri

Large numbers of northern red, southern red, black and scarlet oaks are declining and dying in southern Missouri. Find out why, and learn what you can do about it.

Periodical Cicadas

Periodical cicadas live as nymphs for 13–17 years underground, and then emerge simultaneously to metamorphose into their adult form.

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