Data/hora: 09/06/2024 09:42:00

Provedor de dados: | Tropical Plant Pathology: fitopatologia brasileira
País: | Brazil
Título: | Quantitative analysis of two important epidemiological features of the common bean: Phaeoisariopsis griseola pathosystem
Autores: | Willocquet,Laetitia; Allorent,Delphine; Savary,Serge.
Data: | 2004-12-01
Ano: | 2004
Palavras-chave: | Epidemiology; Angular leaf spot; Phaseolus vulgaris; Infection efficiency; Defoliation; Leaf wetness; Monocycle process.
Resumo: | 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 severity of 18%. The implications of these results on the disease epidemiology are discussed.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000600015
Editor: | Sociedade Brasileira de Fitopatologia
Relação: | 10.1590/S0100-41582004000600015
Formato: | text/html
Fonte: | Fitopatologia Brasileira  v.29 n.6 2004
Fonte: | info:eu-repo/semantics/openAccess