Importancia relativa de nematodos fitoparásitos asociados a Musa spp. y las interrelaciones entre los géneros de mayor valor de prominencia

The plant-parasitic nematodes reduce the yield of plantain and banana up to 80% in highly infested fields. The purpose of this study was to know the plant-parasitic nematodes genera with major relative im-portance and their possible interrelations in plantain and banana crops from the “eje cafetero” and Valle del Cauca states. Thus, compound samples of the root and soil of 30 farms were collected between 2015-2018 and carried to the laboratory for its processing. The plant-parasitic nematodes were extracted, identified to genus level and quan-tified it. Ecological and parasitic parameters (absolute and relative frequencies, absolute and relative densities and absolute and relative prominence value) were determined. Statistical analysis was realized through Principal Components Analysis-PCA, multiple correlation and conglomerates with the data registered. Based in the results, the plant-parasitic nematodes with major relative importance in roots in their order were Meloidogyne, Helicotylenchus, Radopholus, Pratylenchus and Rotylenchulus while in rhizospheric soil were Helicotylenchus, Meloidogyne, Rotylenchulus y Radopholus. The statistical analysis indicated that for Meloidogyne, Helicotylenchus, Radopholus and Pratylenchus there was a positive correlation between the root and soil population densities. Differences in the composition and structure of the plant-parasitic nematodes communities among production zones and distinct synergistic and antagonistic relationships among plant-parasitic nematodes genera were determined.