- Aspen Twig Gall
- Botryodiplodia and Tubercularia Canker
- Boxelder Bug
- Bronze Birch Borer
- Cytospora Canker
- Deep Root Fertilization
- Dutch Elm Disease
- Elm Bark Beetle
- Fireblight
- Honeylocust Pod Gall Midge
- Honeysuckle Witches/Broom Aphid
- IPS Beetle
- Marssonina Leaf Blight
- Mountain Pine Beetle
- Needle Cast of Evergreens
- Oystershell Scale
- Pine Tip Moth
- Pitch Mass Borer
- Pitch Nodule Moth
- Powdery Mildew
- Thyronectria Canker
- Tussock Moth
- Zimmerman Pine Moth
- A Cool Drink of Water…
Aspen Twig Gall
Plants Affected:
Aspen, cottonwood, poplar.
Symptoms:
Galls (swellings) in the new growth of branches give the branch a “knobby” appearance. The damage is caused by an insect.
Life Cycle:
Little is known about this insect but it is thought to infect the new growth soon after the buds break in the spring causing the resulting gall.
Treatment/Care:
as of yet there is no recognized treatment to prevent the galls. It is thought that spraying the base of the tree in April with Diazinon may control the damage. The galls do not adversely affect the tree greatly if it is otherwise healthy.