Fusarium wilt (Fusarium oxysporum f.sp. nicotianae) on burley tobacco (Nicotiana tabacum (burley type)) - 1440055

Fusarium wilt
Fusarium oxysporum f.sp. nicotianae (Johnson) W.C. Snyder & H.N. Hansen

Host: burley tobacco (Nicotiana tabacum (burley type) L.)
Descriptor: Symptoms
Description: Fusarium wilt usually appears in clusters of plants in the field. Yellowing and drying of the leaves on one side of a tobacco plant are typical symptoms. If a strip of the outer stem tissue (bark) is removed from the side of the stalk with yellowed leaves, a brown discoloration of the wood or vascular tissue is present rather than the normal white color. This discoloration usually can be traced from the affected part of the stalk down into the roots. The midribs of leaves on the affected side of the plant are often curved to one side with half of the leaf yellowed and the other half remaining green. In a young plant, the bud may bend toward the side of the plant with the yellowed leaves. Wilting, although implied by the name of this fungal disease, is not typical of diseased plants.
Image type: Field
Image location: United States

Specimen Information

Specimen in collection: No
Specimen Condition:
Identification Method:

Photographer Information

Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States

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Image Number: 1440055

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Image uploaded on Monday, January 01, 1990
Image Information last updated on Monday, May 09, 2011