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Hansen's Plant Pest Library is an invaluable resource for Missouri homeowners who want to learn more about pests and diseases that can affect their trees.

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Plant Pest Library

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Types of Pests

Diseases
Fungus
Bacteria
Virus
Mycoplasma
Nematode
Insects & Mites
Abiotic
All Types

Insects & Mites

There are many different pests that attack trees, some of which you might not even know about. Keep your eyes peeled for these pesky creatures and their destructive behaviors to prevent further damage!

pest diseases
Magnolia Scale

Magnolia scale is a large soft-scale insect native to North America, with the female getting as large as 1/2 inch in diameter. [...]

pest management
Aphids

Aphids are small, soft-bodied insects that feed on plants’ sap using their long,slender mouths to pierce stems, leaves,and other tender plant parts. [...]

pest management
Gouty/Horned Oak Gall

Gouty and horned oak galls are abnormal growths caused by a microscopic wasp that produces chemicals in the tree when depositing eggs. [...]

pest management
Emerald Ash Borer

Emerald ash borer is an invasive beetle that feeds on ash trees in North America. [...]