RESISTÊNCIA DE CULTIVARES DE GRÃO-DE-BICO A MELOIDOGYNE JAVANICA E PRATYLENCHUS BRACHYURUS NO CERRADO BRASILEIRO

Abstract

Chickpeas, due to drought tolerance, have been a good legume option for planting in the second summer crop in the Brazilian Cerrado region. Nematodes often make production in infested areas unfeasible. Thus, the objective of this work was to verify the reaction of chickpea cultivars in the field to root nematode (Meloidogyne javanica) and root lesions (Pratylenchus brachyurus), aiming to prospect resistance sources, and to verify how this culture is affected by these nematodes. Held at the Federal Institute Goiano - Campus Urutaí, GO, during the second crop of 2018, in DBC with 4 repetitions, over naturally infested area. Six chickpea cultivars were evaluated: BRS Aleppo, BRS Cicero, Jamu 96, BRS Cristalino, BRS Toro and BRS Kalifa. At 90 days after sowing (DAS) evaluated reproduction factor, fresh weight of shoot and root system, dry matter of shoot, percentage of total dry matter of plants, chlorophyll content and height of plants. At 110 DAS it determined the grain yield. Data were subjected to analysis of variance and grouping of means by Scott-Knott. P. brachyurus was more aggressive towards M. javanica. All cultivars were resistant to M. javanica in the field, especially Jamu 96 and BRS Kalifa. The cultivars Jamu 96 and BRS Cícero were susceptible to P. brachyurus. BRS Kalifa is the cultivar most resistant to both nematodes and presented higher grain yield.