Control of verticillium and sclerotinia of chrysanthemums with systemic fungicides
AuthorsSeward T. Besemer
Arthur H. Mccain
Albert O. Paulus
Authors AffiliationsSeward 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.
Hilgardia 23(11):12-13. DOI:10.3733/ca.v023n11p12. November 1969.
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.
Also in this issue:Science needs roots in the soil
Amino acid analyzer University of California, Riverside
Lindcove field station
Disease control with pathogen-free bulb stocks for easter lily improvement
Vegetative mapping with false-color infrared aerial photography …and comparison with black and white
Cut rose production increase with nematode control
Sweet cherry hedgerow planting
Effects of time of shearing on wool and lamb production
Plastic containers for avocado nursery trees
Fig varieties: a monograph