Persistence of benomyl-resistant strains of Monilinia fructicola
In South Carolina, US, experiments were carried out to determine the spread and persistence of benomyl-resistant Monilinia fructicola (EPPO A1 list) strains in peach orchards.
Several previous studies had reported that benomyl-resistant M. fructicola strains were less competitive than sensitive strains and recommended culture practices to avoid benomyl for several years until the benomyl-resistant strains had disappeared.
The authors reported, however, that benomyl-resistant M. fructicola strains can survive in orchards for more than two years and that the elimination of benomyl-resistant strains by culture practices is probably not practicable in large orchards.
Sources
Zehr, E.I.; Toler, J.E.; Luszcz, L.A. (1991) Spread and persistence of benomyl-resistant Monilinia fructicola strains in South Carolina peach orchards.
Plant Disease 75, 590-593.