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- Author or Editor: Christene T. Stephens x
Abstract
Selected seed-propagated hybrid geranium (Pelargonium × hortorum Bailey) cultivars were evaluated for resistance to crown and root rot caused by Pythium ultimum Trow in the presence or absence of foliarly applied STS, a petal-shattering preventative that has been demonstrated to increase plant death due to P. ultimum. Plants were evaluated for resistance to plant death, plant stunting, and flower delay by comparing plant growth in P. ultimum-infested medium with plant growth in a noninfested medium. Although immunity to P. ultimum was not identified in the 42 cultivars screened, resistance appeared to be present and may provide a valuable source of germplasm for further screening and subsequent hybridization for resistance.
in
HortScience