How to Manage Pests
UC Pest Management Guidelines
Celery Mosaic Virus
In this Guideline:
Disease symptoms caused by Celery mosaic virus include
yellowing of foliage, mosaic and/or mottling patterns on leaves, vein clearing,
and curled, crinkled, or otherwise distorted foliage. On older leaves necrotic
leaf spots may develop. Plants are sometimes stunted. Outer petioles grow
horizontally, giving the plant a flattened appearance. Certain strains of the
virus may cause more severe symptoms than other strains.
Celery mosaic is the most common viral disease of celery. The virus
is not reported to be seedborne; it is vectored by aphids. Celery is the
primary host of this disease.
For celery mosaic, a host-free period of at least 2 to 3 months (in
which celery is not being grown in the area) greatly reduces the incidence of
celery mosaic. Eliminate weed hosts like wild celery and wild parsnip,
especially during the celery-free period. Although resistance has been reported
in other areas, it does not pertain to commercial varieties used in California.
Cultural controls are acceptable for use on organically grown
Chemicals are not effective against plant viruses. Insecticides for
controlling the vector are not effective in preventing virus infections.
UC IPM Pest Management Guidelines: Celery
UC ANR Publication 3439
S. T. Koike, UC Cooperative Extension, Monterey County
R. M. Davis, Plant Pathology, UC Davis
T. A. Turini, UC Cooperative Extension, Imperial County
Acknowledgment for contributions to Diseases:
R. L. Gilbertson, Plant Pathology, UC Davis
F. F. Laemmlen, UC Cooperative Extension, Santa Barbara County
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