Is Armillaria invasive?
The fungal pathogens that cause Armillaria root disease (Armillaria species) on diverse tree hosts around the world can act as invasive pathogens when they are introduced to new areas.
What does Armillaria root rot do?
Armillaria root rot causes poor growth, yellow to brown foliage, and eventual death of the tree. Armillaria root rot can infect many deciduous and evergreen trees and shrubs. Trees infected with Armillaria root rot have decayed roots and lower trunk. These trees often break or fall over in storms.
What are the symptoms of Armillaria root rot?
Wilted, downward-hanging foliage is often the first obvious symptom of Armillaria root rot. Other symptoms include foliage yellowing, leaf drop, and dieback of upper limbs. During the rainy fall and winter, groups of short-lived mushrooms often grow around the base of Armillaria-infected trees.
What signs should you look for to determine if your tree has Armillaria root disease?
Symptoms and Signs
- Reduced terminal growth.
- Yellowing and eventual browning of needles.
- Whitish resin at the base of tree.
- Creamy-white fans of fungus between bark and wood at the root collar.
- Brown to black fungal rhizomes resembling shoestrings beneath the bark, on the roots, and in the soil.
What is Olearia solandri?
Olearia solandri (Hook, f.) Hook. f. An evergreen shrub up to 15 ft high in the wild, of erect habit, branches broom-like; young shoots angled, clothed with yellowish down.
What is Armillaria solidipes?
Armillaria solidipes, an older name for the fungus called Armillaria ostoyae. North American Fungi 3 (7):261–267 < 10.2509/naf2008.003.00717 >.
What is Armillaria ostoyae and what does it do?
Armillaria ostoyae is probably the most common and aggressive pathogen of conifers in the genus. It can kill trees of all ages and may cause butt rot in older conifers.
What is Armillaria calvescens?
Armillaria calvescens is most commonly found on hardwoods in northern hardwood forests, where it often causes butt rot. It may kill stressed trees.