Tytuł pozycji:
Forecasting ARIMA models for atmospheric vineyard pathogens in Galicia and Northern Portugal: Botrytis cinerea spores
Botrytis cinerea is the cause of the most common disease in the Galician and Portuguese vineyards. Knowledge of the spore
levels in the atmosphere of vineyards is a tool for forecasting models of the concentration of spores in order to adjust the
phytosanitary treatments to real risk infection periods. The presented study was conducted in two vineyards, one located in
Cenlle (Spain) and other in Amares (Portugal), from 2005-2007. A volumetric trap, model Lanzoni VPPS-2000, was used for the
aerobiological study. Phenological observations were conducted on 20 vines of three grape varieties in Cenlle (Treixadura,
Godello and Loureira) and in Amares (Trajadura, Loureiro and Pedernã), by using the BBCH scale. The highest total spore
concentrations during the grapevine cycle were recorded in 2007 in both locations (Cenlle:16,145 spores; Amares:1,858
spores), and the lowest, in 2005 in Cenlle (1,700 spores) and in Amares (800 spores) in 2006. In Cenlle, the best adjusted
model was an ARIMA (0,2,2), including the relative humidity four days earlier, while in Amares there was an ARIMA (1,2,3),
considering the relative humidity three days earlier and rainfall two days earlier. The t-test showed no significant difference
between observed and predicted data by the model.