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Quantitative analysis of two important epidemiological features of the common bean: Phaeoisariopsis griseola pathosystem Trop. Plant Pathol.
Willocquet,Laetitia; Allorent,Delphine; Savary,Serge.
This work quantifies two important epidemiological features of the bean (Phaseolus vulgaris)/Phaeoisariopsis griseola pathosystem. The first is the effect of the number of nights of leaf wetness on infection efficiency. Infection efficiency was below 10% when inoculated leaflets were exposed to less than two nights of leaf wetness. Optimum infection efficiencies were obtained after three to four nights of leaf wetness, at about 50%. Further nights of leaf wetness did not increase the infection efficiency. The second feature quantified is the relative rate of leaflet defoliation for varying levels of angular leaf spot severity. It increased with disease severity according to a logarithm-like curve, and a relative rate of 0.23 day-1 was estimated for a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epidemiology; Angular leaf spot; Phaseolus vulgaris; Infection efficiency; Defoliation; Leaf wetness; Monocycle process.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000600015
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