research article
Control of verticillium and sclerotinia of chrysanthemums with systemic fungicides
authors
Seward T. Besemer
Arthur H. McCain, University of California
Albert O. Paulus, U.C.
publication information
California Agriculture 23(11):12-13. DOI: 10.3733/ca.v023n11p12.
abstract
Verticillium wilt caused by Verticillium albo-atrum and sclerotinia white rot caused by Sclerotinia sclerotiorum are two diseases of commercial chrysanthemums in San Diego County. Previously, the only control of verticillium wilt was soil treatment with chloropicrin or steam prior to planting. In young plants sclerotinia can be prevented by these same soil treatments but tests reported here also show control possibilities by pre-plant application of fungicides on the soil surface. Sclerotinia control may be variable in a maturing cut-flower crop under moist greenhouse conditions where the fungus attacks high on the stems.
author affiliations
Seward T. Besemer is Farm Advisor, San Diego County; Arthur H. McCain is Extension Plant Pathologist, University of California, Berkeley; Albert O. Paulus is Extension Plant Pathologist, U.C., Riverside.
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