No serious disease or insect problems.
Walking stick tree diseases.
Harry lauder s walkingstick corylus avellana contorta is also known as contorted filbert and corkscrew filbert.
You are most likely dealing with eastern filbert blight a disease.
If you see this prune them out one to three feet below where they stop on a branch.
This wonderful plant with it s array of twisted and contorted branches will happily grow in zones 4 through 8 and is one of the few plants that really has no serious disease or insect pest problems.
Learn more about monrovia plants and best practices for best possible plant performance.
All you can do is scout for the stromata masses of fungal tissue that looks like alligator skin on branches stems.
Look also for cankers on limbs especially in the upper canopy.
One disease of particular concern is eastern filbert blight.
The disease that is attacking them is called eastern filbert blight.
Affected branches should be removed and destroyed but viruses in particular are very hard to treat.
Occasional disease problems include black knot crown gall apple mosaic virus and leaf spot.
Tolerant of most sites best in full sun to light shade under tall trees.
Common pests diseases this shrub has good resistance to the filbert blight that can devastate other members of the genus.
Botanically known as corylus avellana contorta harry lauder s walking stick is one of the most interesting interesting plants you can put in your landscape and probably one of the least understood.
It is a cultivar of the tree species european filbert and a close relative to american hazelnut and turkish filbert.
Disease pests and problems.
If your tree comes down with the blight you will notice flowers and foliage turning brown wilting and dying.
This doesn t seem to be a widespread problem but it is happening.
Typically growing as understory or at wood edge in large thickets.
On hazelnuts native to wisconsin such as american hazelnut corylus americana and beaked hazelnut corylus cornuta the disease causes little significant damage but on the commonly grown european hazelnut corylus avellana including harry lauder s walking stick corylus avellana contorta the disease is lethal.
Some harry lauder s walking stick plants corylus avellana contorta are being attacked and are dying slowly.
Henry lauder s walking stick infected with eastern filbert blight is probably too sick to save.
Monrovia s harry lauder s walking stick details and information.
Note that this plant can spread indefinitely.
Branch dieback occurs when cankers girdle the stems.
Tree plant care.
