Monitoring of the sensitivity to fungicides of populations of Botrytis cinerea in Gironde between 1999 and 2003.

摘要

To evaluate the efficacy of botryticide use recommendations against B. cinerea populations in the vineyard, a monitoring committee was formed in Gironde, France, which consisted of Syngenta Agro, Biorizon, Draf-Srpv Aquitaine, Itv Blanquefort and Chambre d'Agriculture de Gironde. Monitoring was carried out from 1999 to 2003 in 443 plots. Resistance to dicarboximides, in spite of a frequency of detection of 70%, decreased with the reduction in the use of these products. For anilinopyrimidine-resistant spores, detected first in 2001, their spread was stabilized, based on an average resistant spore detection of 1.4%. For phenylpyrolles, hydroxyanilides and pyridinamines, the average resistant spore detection was lower than 0.5%. These results confirm the validity of the annual alteration of botryticide mode of action for protection against B. cinerea.