| Host: |
flue-cured tobacco |
|
Nicotiana
tabacum
L.
|
| Photographer: |
R.J. Reynolds Tobacco Company Slide Set, United States |
| Contact: |
J. Michael Moore, University of Georgia |
| Descriptor: |
Symptoms |
| Description: |
This fungal disease causes slow yellowing and drying of the leaves. Symptoms are usually more pronounced on one side of the plant. Leaves may not wilt at first, but those on affected sides of the plants are usually stunted. The top of the plant may be drawn toward the diseased side. Wilting eventually occurs and upper leaves have a bronze cast. On the affected side of the plant, wood beneath the outer bark has a uniform chocolate brown discoloration. Such discoloration can also be seen in the midribs of affected leaves and in roots. Some roots on the affected side die. The unilateral appearance of symptoms and vascular discoloration can cause confusion between Fusarium wilt and Granville wilt. However, the "bacterial streaming" described for Granville wilt is a reliable way to distinguish between these two diseases. Fusarium wilt is frequently accompanied by root-knot nematode infection. |
| Image taken in: |
United States |
|
|
| Image Citation: (?) | | R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org |
|
|
| Image Use: (?) | |
You must attribute the work in the manner specified (but not in any way that suggests endorsement).
|
Available Images Resolutions:
| |
|
Image Information last updated on Sunday, March 10, 2002 |
|
