Occasional disease problems include black knot crown gall apple mosaic virus and leaf spot.
Walking stick tree diseases.
Harry lauder s walkingstick corylus avellana contorta is also known as contorted filbert and corkscrew filbert.
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.
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.
It is a small tree or large shrub that grows up to 8 feet in height and spread but can be kept smaller with pruning.
Typically growing as understory or at wood edge in large thickets.
All you can do is scout for the stromata masses of fungal tissue that looks like alligator skin on branches stems.
Some harry lauder s walking stick plants corylus avellana contorta are being attacked and are dying slowly.
Learn more about monrovia plants and best practices for best possible plant performance.
One disease of particular concern is eastern filbert blight.
No serious disease or insect problems.
You are most likely dealing with eastern filbert blight a disease.
Disease pests and problems.
It is a cultivar of the tree species european filbert and a close relative to american hazelnut and turkish filbert.
Branch dieback occurs when cankers girdle the stems.
Note that this plant can spread indefinitely.
Monrovia s harry lauder s walking stick details and information.
Tree plant care.
Affected branches should be removed and destroyed but viruses in particular are very hard to treat.
Tolerant of most sites best in full sun to light shade under tall trees.
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.
If your tree comes down with the blight you will notice flowers and foliage turning brown wilting and dying.
The disease that is attacking them is called eastern filbert blight.
Henry lauder s walking stick infected with eastern filbert blight is probably too sick to save.
If you see this prune them out one to three feet below where they stop on a branch.
Common pests diseases this shrub has good resistance to the filbert blight that can devastate other members of the genus.
It occurs primarily in the eastern half of the country as well as oregon.
