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United States Department of Agriculture

Agricultural Research Service

Title: Resistance of Pyrus Cultivars and Selections to Fabraea Leaf Spot

Authors
item Bell, Richard
item Van Der Zwet, Tom - ARS EMPLOYEE RETIRED

Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: June 24, 2003
Publication Date: August 1, 2003
Citation: Bell, R.L., Van Der Zwet, T. 2003. Resistance of pyrus cultivars and selections to fabraea leaf spot. Hortscience 38 (5):758. 2003

Technical Abstract: Pear leaf spot, caused by the fungus Fabraea maculata Atk. (anamorph: Entomosporium mespili (DC.) Sacc.) occurs in most areas of the world where pears are grown. Most major cultivars of the European pear, P. communis L., for which data are available are susceptible. Ratings of disease reaction based upon orchard observations which have appeared in the literature are sometimes contradictory. This study evaluated susceptibility within a diverse collection of Pyrus cultivars and other germplasm in a randomized and replicated nursery plot using quantitative measures of disease incidence and severity. The least susceptible genotypes were the P. communis cultivars `Beurre Fouqueray' and `Bartlett', the P. pyrifolia cultivars `Imamura Aki', and the P. communis x P. ussuriensis hybrid NJ 477643275.

Last Modified: 10/20/2014
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