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Resistance in Apple to Four Bark Canker Fungi. Z. Borecki, Professor of Plant Pathology, Warsaw Agricultural University, ul. Nowoursynowska 166, 02 975 Warsaw, Poland. A. Czynczyk, Pomologist, and Z. Puchala, Plant Pathologist, Institute for Pomological Research, 96-100, Skierniewice, Poland; and D. F. Millikan, Professor of Plant Pathology, University of Missouri, Columbia 65211. Plant Dis. 66:1027-1029. Accepted for publication 16 February 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-1027.

Resistance to the pathogens Nectria galligena, Pezicula malicorticis, Phytophthora cactorum, and Stereum purpureum has been identified in apple, Malus pumila. Two cultivars, Vista Bella and NY 58553-1, are resistant to all four pathogens, whereas Discovery and Empire are resistant to three of them. Although the resistance to these bark canker fungi will not provide complete protection, use of these and similarly resistant cultivars could lessen the reliance on chemical control measures.