Seasonal development
and life cycle—Armillaria
Armillaria thrives under moist conditions, for example
when irrigated turf is planted around the roots of California
native oaks. Plants become infected through root contact
with infected plants or rhizomorphs attached to infected
roots. Armillaria root rot can develop slowly, and symptoms
may not appear until the fungus is well established.
The fungus can survive for many years in dead or living tree
roots.
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Rhizomorph (top) with healthy root |
