An integrated method for harvest forecasting based on atmospheric pollen data: From a local forecast to a national forecast
Early harvest forecasts can be made approximately three months before picking based on a reliable and reproducible technique for sampling and analysing atmospheric pollen movements. The laboratory results used must, however, be validated by an agronomic survey. This paper presents the results obtained since 1989 in a network of some fifty observation sites in different wine-growing countries of the European Union, the majority within a community research programme (Mars project, CCR ISPRA). The proposed method can be used to make valid forecasts, on the one hand for the sample zones, and on the other hand nationally. At the local level, fully satisfying results are achieved in approximately 50% of cases. The effect of postfloral conditions, which can significantly effect the potential present at flowering, is the main cause of the differences recorded. It is therefore essential to update the first early forecasts from the pollen analysis by means of agrometeorological models during the year. Furthermore, the dates of the flowering period can be precisely determined by monitoring the evolution of the pollen emission curve.
Bibliographic Reference: Paper presented: XXIIème Congrés Mondial de la Vigne et du Vin, Buenos Aires (AR)
Availability: Available from (1) as Paper FR 41020 ORA
Record Number: 199711579 / Last updated on: 1997-12-09
Original language: fr
Available languages: fr