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Biological Control of Botrytis cinerea on Apple. Arne Tronsmo, Assistant Professor, Department of Microbiology, Agricultural University of Norway, N-1432 Aas-NLH, Norway. Jonas Ystaas, Research Pomologist, Ullensvang Research Station, N-5774 Lofthus, Norway. Plant Dis. 64:1009. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-1009.

Biological control of dry eye rot of apple caused by Botrytis cinerea was obtained by spraying the flowers with a conidial suspension of the antagonistic fungus Trichoderma harzianum.