Fig 1. Disease incidence (a) and severity (b) of oilseed rape (Brassica napus) plants treated with four Alternaria species on various d after inoculation (dai).

Disease incidence was calculated as the percentage of infected plants treated with Alternaria spp. Disease severity was measured according to a 0–9 scale, where 0 is a healthy plant and 9 is a plant completely damaged by the pathogen. Alternaria host species to oilseed rape: A. brassicae, A. brassicicola, A. alternata; non-host Alternaria species to oilseed rape: A. dauci.