CANKERS Flashcards
1
Q
What are some common canker causes?
A
- Sunscald
- Frost
- Bacteria
- Fungus
2
Q
Where can canker infections begin in trees?
A
insect wound mechanical wound lenticels leaf scars invasion from dead bark
3
Q
What are some host resistances to cankers?
A
- Production of cork tissue from the periderm seals off infection, killing outside tissue.
4
Q
What is an exophylactic periderm?
A
- Stretch
- Smooth bark
- advantage is that skin is constantly peeling off, ditching potential disease
5
Q
What is the necrophylactic periderm?
A
Type of periderm that responds to wound
6
Q
What are the three canker types?
A
- Annual - tree walls off infection and wins (Fomopsis)
- Perennial - recurring every year (tree walls off during frowing season but infection wakes up first after winter)
- Diffuse - wins and kills (chestnut blight)
7
Q
What are cankers
A
localized area of dead bark tissue
