Heterobasidion (aka Annosum or Fomes) Root Disease of Pines in the South
Webinar Details
When:
Nov 17, 2016 1:00 pm US/Eastern
Length: 00:48 (hh:mm)
Advance Registration NOT available.
View now on-demand.
Presenter(s):
- Michelle Cram - Plant Pathologist, USDA Forest Service
CEU Credits/Certificate Offered:
- None have been applied for or approved at this time.
Virtual Event Format:
Group Viewing Available:
This webinar will cover the identification, biology, and management of Heterobasidion root rot in the southeast U.S. Heterobasidion root disease is also known as annosum root disease or fomes root disease.
Heterobasidion root disease (HRD), caused by the fungus Heterobasidion irregulare, occurs in pines (Pinus spp.) throughout the eastern U.S. HRD weakens tree roots, and causes canopy thinning, dieback, and sometimes tree mortality. Trees infected with HRD are at a greater risk of windthrow due to weakened roots. Damage from HRD can be confused with insect damage, as initial HRD symptom can be difficult to diagnose. This webinar will cover HRD identification, biology, and management on pines in the southeastern U.S.
Correction in webinar Q&A session:
Heterobasidion irregulare spores were found to move to a depth of 15 cm in sandy soil (Kershaw sand and store-bought sand) in a study by E.G. Kuhlman (1969). The intact O horizon and upper 1.2 cm of soil reduced spore percolation 10-fold.
Kuhlman, E. G. 1969. Survival of Fomes annosus spores in soil. Phytopathology 59:198-201.