Pathogenicity of the Verticillium longisporum isolates from winter rape

Virulence of V, longisporum isolates to several cultivars of spring and winter oilseed rape was evaluated. The cultivars differed in wilt resistance. All isolates tested revealed moderate virulence to susceptible cultivars. Virulence of V. longisporum and V. dahliae isolates to Brassicaceae and Solanaceae crops were studied. V. longisporum isolates did not cause wilt symptoms on tomato and pepper and were virulent to oilseed rape, turnip, cauliflower and egg-plant. V. dahliae isolates differed in virulence to caulifower, tomato and pepper and all of them were virulent to oilseed rape, turnip, and egg-plant. It has been supposed that though in present V. longisporum causes losses on Brassicaceae crops only, a widening of it's host range is very likely in future.