Nematropica (1998) 28, 113-117

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L. Montes, R. Crozzoli and G. Vargas (1998)
[[dc:title::[Response of sweet potato selections to the southern root-knot nematode Meloidogyne incognita in Venezuela]]]
Nematropica 28 (1), 113-117
Abstract: Twenty-eight Ipomoea batatas selections in the Root and Tuber Germplasm Collection of the Agronomy Department of Central University of Venezuela, Maracay, Venezuela, were evaluated for reaction to the southern root-knot nematode, Meloidogyne incognita race 2. Initial densities (Pi) of a combination of 6 eggs and second-stage juveniles per one cm3 of soil were used in a greenhouse replicated study. All selections, except 'UCV-8', were susceptible to M. incognita infection. The nematode reproduction rate (Pf/Pi) on 'UCV-8' was <1 and the galling index value, on a scale 0-5, was 2.5. Low reproduction rates and gall index values of 2.9, 2.4, 2.4, and 2.3 were observed on the selections 'UCV-21', 'UCV-22', 'North Carolina' and 'E-690' respectively.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Spanish)
Database assignments for author(s): Renato Crozzoli

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

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Meloidogyne incognita Sweet potato (Ipomoea batatas) Venezuela