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How to Manage Pests
UC Pest Management Guidelines
Dry Beans
Fusarium
Wilt (Garbanzo Beans)
Pathogen: Fusarium oxysporum f. sp. ciceri
(Reviewed 8/07,
updated 8/07)
In this Guideline:
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In the field, lower leaf yellowing and often stunting of garbanzo
bean plants are the earliest symptoms. Subsequently the plant wilts and dies.
When root knot nematodes are present, symptoms are usually more severe. When
the root or stem of the plant is cut tangentially with a sharp knife, the woody
(xylem) tissue is dark brown. This pathogen does not ordinarily cause a root rot;
however, root rots caused by other pathogens such as Pythium spp., Fusarium solani, Thielaviopsis basicola, and Macrophomina phaseolina may be
associated with the disease.
Fusarium oxysporum survives in
soil for several years as chlamydospores and is specific to garbanzos. The
fungus is systemic and once the plant is infected, it cannot be cured.
Care should be taken to
differentiate Fusarium wilt from a yellows disease caused by one or more
viruses that are transmitted by aphids. The viruses will cause yellowing of the
plant but the color is brighter than with Fusarium wilt. If a virus disease is
suspected, the main symptom to look for is a dark brown color of the bark
tissue (phloem or sugar conducting tissue) when cut open with a sharp knife.
Long-term crop rotation (over 5 years) may help to reduce inoculum
in soil. In fields with a history of Fusarium wilt, resistant cultivars should
be planted. UC-15, adapted to coastal areas, and UC-27, adapted to the Central
Valley, are resistant.
![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
UC IPM Pest Management Guidelines: Dry
Beans
UC ANR Publication 3446
Diseases
R. M. Davis, Plant Pathology, UC Davis
C. A. Frate, UC Cooperative Extension, Tulare County
Acknowledgment for contributions to Abiotic Disorders:
A. E. Hall, Botany and Plant Sciences, UC Riverside
Acknowledgment for contributions to Diseases/Abiotic Disorders:
S. R. Temple, Plant Sciences, UC Davis
Acknowledgment for contributions to Diseases (viruses):
R. L. Gilbertson, Plant Pathology, UC Davis
Acknowledgment for contributions to Diseases (Late-season decline):
J. Deelo, Plant Sciences, UC Davis
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