Articles
RESPONSE OF CUCUMIS MELO GENOTYPES MR-1 AND PI 124112 TO CZECH ISOLATES OF CUCURBIT POWDERY MILDEW
Article number
588_28
Pages
181 – 184
Language
English
Abstract
The response of Cucumis melo genotypes MR-1 and PI 124112 to 72 isolates of powdery mildew (Sphaerotheca fuliginea, Erysiphe cichoracearum) originating from Cucurbita spp. was evaluated on leaf discs in vitro as a part of pathotype and race determination programme in the Czech Republic.
Of eight isolates of S. fuliginea only one produced symptoms of a reduced mycelium development on leaf discs of MR-1. Of 33 isolates of E. cichoracearum one isolate was virulent to the MR-1, while six other isolates expressed infection capability to MR-1 which reacted with symptoms of incomplete resistance.
From a total of 31 mixed (E. cichoracearum + S. fuliginea) isolates only one was virulent on the MR-1 and one on the PI 124112. These genotypes expressed incomplete resistance after inoculation with eight mixed isolates.
Of eight isolates of S. fuliginea only one produced symptoms of a reduced mycelium development on leaf discs of MR-1. Of 33 isolates of E. cichoracearum one isolate was virulent to the MR-1, while six other isolates expressed infection capability to MR-1 which reacted with symptoms of incomplete resistance.
From a total of 31 mixed (E. cichoracearum + S. fuliginea) isolates only one was virulent on the MR-1 and one on the PI 124112. These genotypes expressed incomplete resistance after inoculation with eight mixed isolates.
Publication
Authors
E. Krístková, A. Lebeda, J. Katovská
Keywords
Erysiphe cichoracearum, Sphaerotheca fuliginea, melon, virulence, pathotypes, races, infection degree
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