Resistência de Linhagens de Feijão-guandu a Meloidogyne javanica
2010; Volume: 34; Issue: 2 Linguagem: Inglês
ISSN
0102-2997
AutoresJerônimo Vieira de Araújo, Mário Massayuki Inomoto, R. Godoy, Luiz Carlos Camargo Barbosa Ferraz,
Tópico(s)Agronomic Practices and Intercropping Systems
ResumoPigeonpea (Cajanus cajan) is a green manure with potential for breaking dense, compacted layers of the soil, a field condition often found in Brazilian sugarcane-producing areas under renewal. Nevertheless, the host status of most Brazilian pigeonpea lines to Meloidogyne javanica, an economically important nematode pest for sugarcane, remains unknown. Thus, this work dealt with the assessment of the resistance of 40 Brazilian pigeonpea lines in relation to M. javanica under greenhouse conditions. The host status for each tested interaction was defined with basis on the nematode reproduction factor (RF) and nematode number per gram of roots. The reaction of 40 lines was studied in two initial experiments and a subsequent third trial was additionally conducted, as a replica, for the re-evaluation of 11 previously tested lines. The reaction varied largely, ranging from resistance (g58-95, g109-99, g146-97, g137-99, g9m-97, g186-99, g1m-95, g59-95, g127-97, g17C-94 and g66-95) to moderate resistance (g40-93 and g5-94) and susceptibility (the remaining lines). Practical implications of rotating pigeonpea with sugarcane in nematode-infested fields are briefly discussed.
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