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Wind Injury of Anjou Pear. J. T. A. Proctor, Associate Professor, Department of Horticultural Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1. Plant Dis. 66:1169-1170. Accepted for publication 22 April 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-1169.

Marginal blackening of terminal leaves, necrosis of stipules, and blackening of stems were observed on trees of Anjou pear, Pyrus communis, from orchards in exposed location and on greenhouse-grown trees after exposure to wind at 3 m/sec in a wind tunnel. Similar injury could not be induced readily on Bartlett and was not observed in the orchard on Bartlett, Bosc, Clapp, of Flemish Beauty. Maximum net photosynthesis of the uninjured leaves of Anjou was about 0.7 mg CO2/m2 per second; rates for injured leaves depended on the extent of the injury and were as low as 0.3 mg CO2/m2 per second. Rates of dark respiration and transpiration were higher in injured leaves than in uninjured leaves.

Keyword(s): Beurre d’Anjou.