A greenhouse test for screening sugar beet (Beta vulgaris) for resistance to Rhizoctonia solani

Citation
Oe. Scholten et al., A greenhouse test for screening sugar beet (Beta vulgaris) for resistance to Rhizoctonia solani, EUR J PL P, 107(2), 2001, pp. 161-166
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Plant Sciences
Journal title
EUROPEAN JOURNAL OF PLANT PATHOLOGY
ISSN journal
0929-1873 → ACNP
Volume
107
Issue
2
Year of publication
2001
Pages
161 - 166
Database
ISI
SICI code
0929-1873(200102)107:2<161:AGTFSS>2.0.ZU;2-F
Abstract
Rhizoctonia solani Kuhn is a serious plant pathogenic fungus, causing vario us types of damage to sugar beet (Beta vulgaris L.). In Europe, the disease is spreading and becoming a threat for the growing of this crop. Plant res istance seems to be the most practical and economical way to control the di sease. Experiments were carried out to optimise a greenhouse procedure to s creen plants of sugar beet for resistance to R. solani. In the first experi ment, two susceptible accessions were evaluated for root and leaf symptoms, after being grown in seven different soil mixtures and inoculated with R. solani. The fungus infected all plants. It was concluded that leaf symptoms were not reliable for the rating of disease severity. Statistically signif icant differences between the soil mixtures were observed, and there were n o significant differences between the two accessions. The two soil mixtures , showing the most severe disease symptoms, were selected for a second expe riment, including both resistant and susceptible accessions. As in the firs t experiment, root symptoms were recorded using a 1-7 scale, and a signific ant expression of resistance was observed. The average severity of the dise ase in the greenhouse experiment generally was comparable with the infectio n in field experiments, and the ranking of the accessions was the same in t he two types of experiments. It was concluded that evaluation procedures in the greenhouse could be used as a rapid assay to screen sugar beet plants for resistance to R. solani.