A target canker caused

1
A target canker caused Nectria through rounds
of growth and die back of cambium.
2
Ceratocystis canker on Aspen
3
Dermea Canker on Douglas-fir
4
Phomopsis canker on Douglas-fir
5
Canker formed by Stalactiform rust on lodgepole
pine
6
Atropellis canker of pine
7
Cypress canker Seridium cardinale at Berkeley
Marina
8
Seiridium cardinale showing pitch dripping canker
9
Seiridium cardinale asexual fruiting body
(acervuli) and mitotic spores
10
Cytospora abietis canker on red fir in the
Sierra it occurs primarily on mistletoe
infected branches
11
Strands of sticky mitotic spores of Cytospora on
popular
12
Hypoxylon mammatum - aspen canker
13
Hypoxylon canker showing black stroma with
embedded perithecia (below)
14
Diagram of Hypoxylon spore germination in
response to bark exudates
15
Chestnut blight Cryphonectria parasitica
16
Chestnut blight effects
17
Chestnut blight effects
18
Pitch Canker - Fusarium circinatum
19
Dogwood anthracnose Discula destructiva