A greenhouse method for screening lettuce for resistance to Sclerotinia sclerotiorum |
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| Authors: | Abdul Madjid Shigemi Honma Melvyn L Lacy |
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| Institution: | 1. Department of Horticulture, Michigan State University, East Lansing, MI 48824 U.S.A.;2. Department of Botany, Michigan State University, East Lansing, MI 48824 U.S.A.;3. Department of Plant Pathology, Michigan State University, East Lansing, MI 48824 U.S.A. |
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| Abstract: | Agar blocks colonized by Sclerotinia sclerotiorum, causal agent of lettuce drop, were used as inoculum in screening for resistance to this pathogen in the greenhouse.Since the degree of resistance to the pathogen among cultivars varied with the time observed after inoculation, resistance was assessed by the number of days for 50% of the plants of each cultivar to die, as well as the number of plants that died. The cultivars ‘PI (Plant Introduction) 250427’, ‘Taiwan’, ‘PI 251790’, ‘PI 255568’, ‘MSU 73-44’ and ‘Bibb’ were found to have a higher level of resistance to S. sclerotiorum than the cultivar ‘Grand Rapids’ at 12 or 15 days following inoculation. |
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| Keywords: | cincturing (ringing) dormancy flowering lychee temperature |
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