University of California

Celery petiole lesion damage caused by insecticide


Steven T. Koike
Richard F. Smith
Kurt F. Schulbach
William E. Chaney

Authors Affiliations

S.T. Koike is Plant Pathology Farm Advisor; R.F. Smith is Vegetable Crop and Small Farm Advisor with UCCE, San Benito County. The authors thank the following technicians for their assistance with the project: Y.-T. Cao, T.G. Gonzalez, D.M. Henderson and E.D. Oakes. We acknowledge the celery industry in California and the California Celery Research Advisory Board for their support of this work, and thank the following individuals for their help: F. Alexander, D. Celis, J. Dow, B. Gray, A. Greathead, H. Kinnaman, M. Lamb, S. Lanini, W. Maitoza, M. McBride, E. Mora, M. Mulanax, A.O. Paulus, B. Riddle, J. Romans, B. Stickles and H. Yamaoka. We thank Hartnell College for the use of their East Campus field facility; K.F. Schulbach is Irrigation Farm Advisor; W.E. Chaney is Entomology Farm Advisor, all with UC Cooperative Extension, Monterey and Santa Cruz counties.

Publication Information

Hilgardia 52(4):36-40. DOI:10.3733/ca.v052n04p36. July 1998.

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A previously undiagnosed problem, called celery petiole lesion (CPL), caused significant damage to coastal celery for several years. A 2-year study found CPL to be associated with applications of the insecticide Dibrom. The product is no longer labeled for use on celery. CPL can be mistaken for two fungal diseases, highlighting the importance of accurate diagnosis of plant problems to reduce unnecessary applications of pesticides.

Koike S, Smith R, Schulbach K, Chaney W. 1998. Celery petiole lesion damage caused by insecticide. Hilgardia 52(4):36-40. DOI:10.3733/ca.v052n04p36
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