Fire blight plant protection efficacy trial with resistant apple cultivar ‘Ladina’

Abstract Fire blight is a devastating disease of apple, pear and quince caused by the Gram-negative bacterium Erwinia amylovora . As antibiotics are not allowed against fire in Switzerland, optimization alternative plant protection strategies required. In this context, tolerant cultivars become higher importance to control disease. A product efficacy trial with susceptible cultivar ‘Gala Galaxy’ ‘Ladina’ bred at Agroscope was set up Steinobstzentrum Breitenhof 2018. Four different treatment strategies, including an untreated control, were tested on both after inoculation showed less blossom cluster infection treated plants compared Galaxy’. Blossom rates following treatments did differ significantly from each other whereas they ‘Ladina’.