Honeylocust Tree Diseases


The honeylocust (Gleditsia triacanthos) is a quick-growing, drought-tolerant tree that produces fragrant spring flowers. Honeylocusts are sun-loving shade trees that tolerate a wide range of soils. Though the honeylocust is hardy, this deciduous tree is susceptible to several diseases.

Thyronectria Canker

Thyronectria is an opportunistic fungal disease that feeds on drought- and heat-stressed honeylocusts. The disease causes branch dieback and cankers that distort the tree's shape and stunt its growth. If left untreated, Thyronectria can cause death.

Crown Canker

Crown canker is a pathogen disease that attacks the bark around the base of the tree. The deadened base of the tree results in the dieback and eventual death of the entire tree.

Ganoderma Root Rot

Ganoderma root rot is a fungal disease that produces shelf fungus on the trunk, near the soil line. This disease causes fungal tissue growth under the bark and can kill untreated trees.

Phymatotrichum Root Rot

Phymatotrichum root rot is a soil-born fungal disease. It attacks alders that rest in alkaline soils with low amounts of organic matter. This slow spreading disease will quickly kill the tree once infected.

Spiculosa Cankers

Spiculosa cankers are fungal cankers that grow under the bark of the tree. The cankers leave rough, circular swellings on the tree and rot the tree's internal tissue, leaving it dead and unusable. Infected trees must be removed.


  • Spiculosa Canker
  • Honeylocust Diseases
  • Crown Canker
Keywords: honeylocust trees, honeylocust diseases, crown canker

About this Author

Writing professionally since 2004, Charmayne Smith focuses on corporate materials such as training manuals, business plans, grant applications and technical manuals. Smith's articles have appeared in the "Houston Chronicle" and on various websites, drawing on her extensive experience in corporate management and property/casualty insurance.