Relacion Huesped-Parasito de Meloidogyne incognita en Los Cultivares de Pimiento, Blanco del Pais y Cubanelle en Puerto Rico
Keywords:Root-Knot Nematode, Inoculum Level, Nodulation Index, Giant Cells
AbstractGreenhouse experiments were conducted to determine the inoculum levels of the root-knot nematode (Meloidogyne incognita) needed to damage pepper plants of cultivars Blanco del Pais and Cubanelle. Levels of 2500, 5000, 10000, 20000, 40000, and 80000 eggs and second-stage juveniles of the nematode M. incognita per plant were included and compared to nematode-free plants. The most prominent svmptoms were stunting, chlorosis, and an appreciably reduced development of the root systems. Significant differences in plant growth, nodulation, and day weight of shoot and roots were found between the control plants and the nematode-inoculated plants at all inoculum levels. No significant differences were found among the various inoculum levels for the parameters studied. The level of 2500 eggs and second-stage juveniles resulted in a significantly lower nodulation index when compared to the other levels.