ISHS Acta Horticulturae 588: II International Symposium on Cucurbits
RESPONSE OF CUCUMIS MELO GENOTYPES MR-1 AND PI 124112 TO CZECH ISOLATES OF CUCURBIT POWDERY MILDEW |
| Authors: | E. Krístková, A. Lebeda, J. Katovská |
| Keywords: | Erysiphe cichoracearum, Sphaerotheca fuliginea, melon, virulence, pathotypes, races, infection degree |
| 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. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
