The spread and persistence of benomyl-resistant Monilinia fructicola were studied in an experimental peach orchard, and results were compared with conditions in several commercial peach orchards in which resistance to benomyl had occurred. One fungus strain that was resistant to iprodione was also examined in the experimental orchard. Benomyl-resistant strains became established and spread in the experimental orchard, but the frequency of isolation of these strains relative to sensitive strains declined as the progressed unless the trees were sprayed with benomyl (...)
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E. I. Zehr (1991) studied this question.