Proučavanje populacije Erysiphe graminis f. sp. hordei, parazita ječma, pomoću pokretnih rasadnika

Abstract

Prikazani su rezultati trogodišnjih (1995-1997) proučavanja populacije Erysiphe graminis hordei korišćenjem pokretnih rasadnika. Utvrđeno je da svi ispitivani Ml geni otpornosti imaju odgovarajuće gene virulentnosti u populaciji ovog parazita. Najmanju učestalost su imale v-05, V-p i V-(1402) virulentnosti. Dinamika razvoja ovog parazita u prolećnom delu vegetacije ječma je bila različita po godinama. Maksimalne vrednosti koeficijenta infekcije u 1995. godini su zabeležene krajem aprila, a u 1997. godini početkom maja.

Spring population of Erysiphe graminis hordei, of the barley pathogen, was analyzed using of mobile nurseries in the Kragujevac locality (Serbia) during the period from 1995 to 1997. There were significant differences in the course of development of this parasite between years and depending on environmental conditions during plant standing in the field. Maximal values of coefficient of infection in 1995 were in V (27-28 of April) and 1997 in VI (8-9 of May) mobile nurseries. In 1996 powdery mildew severity was very low, because of unfavourable environmental conditions for disease development.