University of California

Control of verticillium and sclerotinia of chrysanthemums with systemic fungicides


Seward T. Besemer
Arthur H. Mccain
Albert O. Paulus

Authors 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.

Publication Information

Hilgardia 23(11):12-13. DOI:10.3733/ca.v023n11p12. November 1969.

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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.

Besemer S, Mccain A, Paulus A. 1969. Control of verticillium and sclerotinia of chrysanthemums with systemic fungicides. Hilgardia 23(11):12-13. DOI:10.3733/ca.v023n11p12
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