Nematofauna en zonas productoras de arveja en Cundinamarca, Colombia

Despite their importance, the presence of plant-parasitic nematodes that affect pea crops in Colombia remains unknown. To determine the nematode fauna present in the pea crop areas of Cundinamarca (Colombia), 68 soil samples were collected from the municipalities of Une, Subachoque, Madrid, and Mosquera and analyzed. Nematodes were extracted using a sieving centrifugal-flotation technique and identified using standard taxonomic keys. Tylenchus was common across all locations, and Pratylenchus was found in three of the four municipalities under study. In addition,Helicotylenchus, Paratylenchus, and Globodera were found in two of four locations. Rotylenchus and Tylenchorhynchus were only recollected in Subachoque, while Monotrichodorus was found only in Une, and Nothocriconemoides, in Mosquera. Regarding relative abundance: Une, Mosquera, and Subachoque showed high percentages of plantparasitic nematodes (68.0%, 54.8%, and 35.7%, respectively). In contrast, bacterial feeder nematodes were more abundant in Madrid (51.3%). Subachoque had the greatest diversity (0.83), followed by Une (0.80), Mosquera (0.76), and Madrid (0.59), according to Simpson’s diversity index. The genera Monotrichodorus and Nothocriconemoides, found in pea-producing areas of Colombia, had not been previously reported. The results obtained represent the first approach to nematode fauna in pea-producing regions of Cundinamarca.