control of apple blue mold by the antagonistic yeast pichia.pdf

Plant Disease / March 2011 311 Control of Apple Blue Mold by the Antagonistic Yeast Pichia anomala Strain K: Screening of UV Protectants for Preharvest Application Rachid Lahlali, AAFC, Saskatoon Research Centre, 107 Science Place, Saskatoon, S7N 0X2, Saskatchewan, Canada, and Plant Pathol-ogy Unit, Gembloux Agro-Bio Tech, University of Liege, Passage de Deportes 2, 5030 Gembloux, Belgium; Yve s Bros t aux, Applied Statistics, Mathematics puter Science Unit, Gembloux Agro-Bio Tech, University of Liege; and M. Haissam Jijakli, Plant Pathology Unit, Gembloux Agro-Bio Tech, University of Liege Abstract Lahlali, R., Brostaux, Y., and Jijakli, M. H. 2011. Control of apple blue mold by the antagonistic yeast Pichia anomala strain K: Screening of UV protectants for preharvest application. Plant Dis. 95:311-316. When applied preharvest, antagonistic yeasts that act as biocontrol agents of postharvest fruit diseases must survive the environmental conditions in the field. In particular, UV-B radiation (280 to 320 nm) can greatly reduce their survival and effectiveness. The influence of artificial UV-B radiation on Pichia anomala strain K, an antagonistic yeast with potential for control of postharvest fruit diseases, was evalu-ated in vitro and in vivo. The in vitro 50 and 90% lethal dose values were and Kj/m2, respectively, whereas lethal values in vivo were and Kj/