Pakistan Journal of Nematology (2004) 22, 157-165

W.M.A. El-Nagdi, M.M.A. Youssef and Z.R. Moustafa (2004)
Reaction of sugar beet varieties to Meloidogyne incognita root-knot nematode based on quantitative and qualitative yield characteristics
Pakistan Journal of Nematology 22 (2), 157-165
Abstract: Thirty varieties of sugar beet plant either as monogerm or multigerm seeds were evaluated for their productivity and susceptibility/resistance against the infection by Meloidogyne incognita root-knot nematode. All the tested varieties varied in the degree of nematode development and reproduction i.e., root damage index (DI). Of these, one variety was categorized as highly susceptible, 9 as susceptible and 20 as moderately resistant to nematode infestation. Host vigor is a new term in this study, which was calculated as an average of percentages root yield potential (as a quantitative characteristic) and sucrose and total soluble solids (as qualitative characteristics). The combination between host vigor and root damage index gives us a better evaluation and a clear correlation between nematode development, reproduction and sugar beet quantity and quality. Thus, 5 sugar beet varieties were rated as highly susceptible, 5 as susceptible, 8 as resistant and 12 as moderately resistant.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Mahmoud M. Ahmed Youssef, Wafaa M.A. El-Nagdi

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Beet/sugarbeet (Beta vulgaris)	Egypt