Stability of spring barley varieties to the pathogen Ustilaho nuda Kell. et Swing

Abstract

Basend on these studies it has been found a clear manifistation of the hidden losses evident and latent spring barley varieties from the dusty smut. All studied varieties, except for Votograis, had significant losses from smut that expressed lower elements of the structure and field. The cultivars Vodogray and Eney were not affected by loose smut. Maximum infection was observed on cultivar Sebastyan. Parameters of productivity of this cultivar were significantly de- creased in result of disease in compare with cultivars Vodogray and Eney. The differences in number of heads were 65 and 45, respectively, in weight of 1000 seed — 11.74 and 8.53 g, in yield — 0.53 and 0.45 t/ha. Winter barley cultivars Fenix and Eney were recorded to have direct and indirect losses as result of loose smut infection. The productivity parameters and yield of these cultivars were also decreased. Vodograi, spring borley variety has shown high resistance to loose smut, evident and latent hidden losses, and can be recommended for production.