Spatial distribution pattern of common bean “amachamiento” (Aphelenchoides besseyi Christie) in field.

 

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Autores: Chaves-Barrantes, Néstor Felipe, Araya-Fernández, Carlos Manuel
格式: artículo original
状态:Versión publicada
Fecha de Publicación:2014
实物特征:The objective of the research was to determine the spatial distribution pattern of common bean “amachamiento” in field. It was carried out from May through July 2009 in Pérez Zeledón, San José Province, and Buenos Aires, Puntarenas Province, in Costa Rica. Disease incidence in micro plots was evaluated in two commercial fields following two different crop rotation systems: rice/common bean and corn/common bean. Spatial distribution of “amachamiento” in field was determined by using the ordinary runs analysis, variance to mean ratio (V/M), Lloyd and Morisita’s index. The ordinary runs analysis showed -1.06 Z value for the first crop rotation system and -0,98 for the second one, what suggested an aggregated spatial pattern (patches) of the disease in the field. The M/V, Lloyd and Morisita’s index were over 1 in both fields, what confirmed the aggregated pattern. Patches of “amachamiento” in the field can be masked by crop rotation with hosts of the nematode Aphelenchoides besseyi – its causal agent –, especially corn/common bean rotation since the farmer spread over the field the surviving inoculum in crop debris before the common bean crop.
País:Portal de Revistas UCR
机构:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
语言:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/14186
在线阅读:https://revistas.ucr.ac.cr/index.php/agromeso/article/view/14186
Palabra clave:false angular leaf spot
foliar nematode
spatial pattern
Phaseolus vulgaris L.
falsa mancha angular
nematodo foliar
patrón espacial