Abstract

PEREZ QUISPE, Fernando; CRUZ CHOQUE, David; POMA LOZA, Estanislao  and  CADENA MIRANDA, Freddy. Population density of nematodes in coffee (Coffea arábica L.), Alto Lima-Caranavi. RIIARn [online]. 2017, vol.4, n.1, pp.53-59. ISSN 2409-1618.

The presence and imperceptible attack of the nematodes, along with other factors, considerably reduce the yields of the coffee crop, affecting the economic income of the families. In this reason, the research was carried out in orderto identify and quantify the main genera of plant nematodes, affecting coffee production in the sub-central of Alto Lima, Caranavi province, La Paz. A method of identification using taxonomic codes was used, quantification of nematodes by sieving and centrifugation, flotation of sugar solutions, proposed by Araya et al. (1995), and modified by the phytopathology laboratory of the Faculty of Agronomy of the UMSA. The presence of the genera: Meloidogyne sp., Pratylenchus sp., Helicotylenchus sp., Criconemella sp., and free-living nematodes were identified. The laboratory analysis was in 100 g of soil and in 25 g of roots, the most significant values are found when there is an attack inside the roots, arriving to find: Meloidogyne sp., In 81.5% and 72.0% in the zones Low and high, the population density of the genus Pratylenchus sp., Fluctuates between 9.2% and 14.6% in the low and high areas, respectively. The genus Helicotylenchus sp., Is found in the roots in 7.9% and 11.0% in the low and high areas respectively. The genus Criconemella sp. does not report significant damage level inside in the roots. Finally, an important presence of free-living nematodes was observed, with a population density of about 50% of the soil nematode.

Keywords : Nematodes; Coffea arabica L.; Meloidogyne sp.; phytopathology; Caranavi.

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