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Fungicide Impact on in vitro Germination of Basidiospores of Puccinia horiana, the Causal Agent of Chrysanthemum White Rust

C. L. Palmer, M. R. Bonde, S. E. Nester, J. M. Revell, and D. G. Luster

April 2015


Upon diagnosis, Puccinia horiana triggers an eradication protocol combining destruction of symptomatic chrysanthemums and a fungicide regime for asymptomatic plants. Symptoms typically appear during the fall as growers prepare to ship their crops. To expand the list of effective fungicides and provide a baseline for monitoring resistance over time, the authors screened in vitro germination of P. horiana basidiospores in 0.05% water agar solution amended with varying concentrations of 14 fungicides.


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