Plant Pest Library

Apple Scab

Apple scab is a fungus that causes leaves of susceptible apple and crabapple trees to yellow and fall off. [...]

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. [...]

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. [...]

Emerald Ash Borer

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