Data/hora: 16/06/2024 15:35:37

Provedor de dados: | 102
País: | Brazil
Título: | Factors affecting density of airborne Gibberella zeae inoculum
Autores: | Del Ponte,Emerson M.; Fernandes,José Maurício C.; Pierobom,Carlos R.
Data: | 2005-02-01
Ano: | 2005
Palavras-chave: | Fusarium graminearum; Aerobiology; Spore dispersal; Epidemiology.
Resumo: | Fusarium head blight (FHB) is a disease of increasing concern in the production of wheat (Triticum aestivum). This work studied some of the factors affecting the density of airborne Gibberella zeae inoculum. Spore samplers were placed at the edge of a field in order to observe spore deposition over a period of 45 days and nights in September and October, the period that coincides with wheat flowering. Gibberella zeae colonies were counted for each period and values transformed to relative density. A stepwise regression procedure was used to identify weather variables helpful in predicting spore cloud density. In general, a predominant night-time spore deposition was observed. Precipitation and daily mean relative humidity over 90% were the factors most hightly associated with peak events of spores in the air. Models for predicting spore cloud density simulated reasonably well with the fluctuation of airborne propagules during both night and day, with potential to be integrated into an FHB risk model framework.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000100009
Editor: | Sociedade Brasileira de Fitopatologia
Relação: | 10.1590/S0100-41582005000100009
Formato: | text/html
Fonte: | Fitopatologia Brasileira  v.30 n.1 2005
Fonte: | info:eu-repo/semantics/openAccess