Distribution of Monilinia species on peaches and nectarines in Ebro valley, Spain.
M. Villarino, C. Casals, N. Lamarca, J. Usall, J. Segarra, A. De Cal and P. Melgarejo.
Journal of Plant Pathology Volume 90 (2, Supplement) August 2008, Book of Abstract, 9th International Congress of Plant Pathology, August 24-29, 2008 Torino, Italy,. 507 pages.
2008
บทคัดย่อ
Distribution of Monilinia species on peaches and nectarines in Ebro valley, Spain.
Monilinia laxa and M. fructigena were the known causal agents for brown rot in peaches and nectarines in Spain until M. fructicola was reported in Ebro Valley, Spain, in 2006. M. laxa was isolated in 85-90% of brown rot fruit, followed by M. fructigena isolated in 10-15%. Post-harvest losses are typically severe, especially when conditions are favourable for disease development, in some cases reaching 80-85%. To determine the distribution of each Moniliniaspecies in EbroValley, more than fifty peach or nectarine orchards were selected in five areas in 2006 and 2007. Between 400-500 brown rot fruit were removed from orchards each year. Over 700 isolates were identified by PCR using the molecular specific primers IlaxaS and IlaxaAS for M. laxa, IGenaS and IGenaAS for M. fructigenaand IColaS and IcolaAS for M. fructicola. M. laxawas the species most isolated, followed by M. fructicolaand M. fructigena. The distributions and epidemic frequencies of the species were different between areas and years. The spatial relationships will be discussed. In addition, phenotypic characterization of the isolates of each species was also carried out, analyzing their aggressiveness and their resistance profile to fungicides.