Transcript WOOD DECAY
WOOD DECAY
Learning Objectives
Chemistry of Decay
White rot and Brown rot
Wood Decay and Forest Ecology
True heart rot and wound decay
Conditions for decay and defense mechanisms
Some important Decay Diseases:
Yellow brown top rot ; Brown crumbly rot
Red ring rot; Red stringy rot; Red-brown butt rot
WOOD DECAY
IMPACTS
SUCCESSION AND NUTRIENT CYCLING
WILDLIFE
VOLUME LOSS AND DEGRADE
PRODUCTS
HAZARD
Phaeolus
schweinitzii
Red-brown
butt rot
FOMITOPSIS
PINICOLA
RED BELT CONK
“BROWN CRUMBLY ROT”
DECAY
ECOLOGY
SAPROPHYTIC
DECAY
Deterioration of Killed Trees
(% volume loss)
Windthrown Old Growth on the Olympic Peninsula
5 years
Douglas-fir
8 years
15 years
_____________________________
18%
23%
31 %
Sitka Spruce
31%
44%
82%
Western Hemlock
55%
87%
100%
Western redcedar
8%
(8%)
(8%)
Deterioration of Killed Trees
(% volume loss)
Beetle-killed Westside Douglas-fir
YEARS
1
3
5
7
9
LOSS
1%
9%
24% 38% 56%
11
70%
WOUND DECAY
TOP ROT
FOMITOPSIS CAJANDERI
“BROWN TOP ROT”
TRUE HEART ROTS
PHELLINUS PINI
WHITE SPECK
“RED RING ROT”
INDIAN PAINT FUNGUS
ECHINODONTIUM TINCTORUM
TRUE HEART ROT
WHITE ROT
“RUST RED STRINGY ROT”
CHEMISTRY OF DECAY
BROWN
ROT
WHITE ROT
Webster and Weber,
Cambridge Univ. Press
DEFENSE
DEFENSE AGAINST DISEASE
PASSIVE, PREFORMED, CONSTITUATIVE
OUTER PHYSICAL/CHEMICAL BARRIER
BARK/CUTICLE
H2O, O2, N LIMITS
HEARTWOOD CHEMISTRY
EXTRACTIVES
DEFENSE AGAINST DISEASE
ACTIVE, RESPONSIVE, INDUCED
WALL THICKENING
PHENOLIC CHEMISTRY
WOUND PERIDERM
PROGRAMMED CELL DEATH
DEFENSE
1
6
3
4
2
5