Some Characteristics of Alternaria alternata Strains Resistant to Iprodione. W. J. McPhee, Research Scientist, Agriculture Canada, Research Station, Summerland, B.C. V0H 1Z0. Plant Dis. 64:847-849. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1980. DOI: 10.1094/PD-64-847.

An isolate of Alternaria alternata was recovered from sweet cherries in storage, and variants within the wild population of the fungus were resistant to the fungicide iprodione. These resistant strains remained stable after a series of transfers in the absence of the fungicide and responded similarly to the wild type strain when tested against other chemicals. The iprodione-resistant strains were tolerant of DCNA; the wild type was sensitive. The capacity of these resistant isolates to cause rotting of cherries in storage was demonstrated.