Virulentnost Erysiphe graminis· f. sp. tritici

Abstract

Prouzrokovač pepelnice (Erysiphe graminis tritici) može u znatnoj meri da utiče na prinos pšenice. Najpouzdaniji i najekonomičniji način zaštite je selekcija i gajenje otpornih sorti. Uspeh u selekciji, pored ostalog zavisi i od poznavanja spektra virulentnosti gljive, što nas je navelo na ova proučavanja u jugoistočnom delu Jugoslavije. Izolati patogena, dobiveni iz kleistotecija prikupljenih sa raznih sorti pšenice testirani su izogenim linijama pšenice (Pm. geni). Ustanovljen je veliki broj formula virulentnosti i njihova distribucija u 1987. i 1988. godini.

A causal agent of Powdery mildew of wheat (Erysiphe graminis tritici) is able to reduce the yield to a rather high degree. The most reliable and the most economic control of the pathogen is based on breeding and growing of resistant cultivars. For the successful breeding of such varieties it is necessary to make a previous investigation of Powdery mildew population. In 1987 and 1988 cleistothecia of the fungus were analysed on near-isogenic wheat lines. It was found virulence diversity within the population of mildew pathogen.