Research Notes: Respuesta de Selecciones de Batata al Nematodo Agallador Meloidogyne incognita en Venezuela
Keywords:Host Response, Ipomoea batatas, Meloidogyne incognita, Resistance, Susceptibility, Tolerance
AbstractTwenty-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 cm 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.