Fusarium Wilt

Fusarium oxysporum f. sp. lycopersici

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Symptoms:
Fusarium wilt is distributed world wide; several biological forms (or races) of the pathogen are known. Leaves or whole branches wilt, turn yellow, then brown and die still attached to the plant (described as a yellow-flagging appearance). Sometimes half of a leaf or branch will be affected, with the other half seemingly unaffected. The fungus can be observed as brown discoloration in the vascular tissue of affected branches.

Control:
Infection enters the plant through the roots, and may be spread rapidly between plants in a field by irrigation. The best control in this case is prevention, by selecting varieties that are resistant to the disease.

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Publication Revised December 2008