Data di Pubblicazione:
2011
Citazione:
CAA, phenylamide and QoI resistance assessment in Plasmopara viticola oospores / S.L. Toffolatti, L. Serrati, A. Vercesi - In: Modern fungicides and antifungal compounds VI / [a cura di] H. W. Dehne, H. B. Deising, U. Gisi, K. H. Kuck, P. E. Russell, H. Lyr. - Braunschweig : DPG Spectrum Phytomedizin, 2011. - ISBN 9783941261105. - pp. 267-272
Abstract:
The development of appropriate anti-resistance strategies should be based on reliable data on the
sensitivity to fungicides used for the control of P. viticola populations which were collected early
in the season before the start of grapevine development. Sensitivity tests were carried out by
assessing the germination of oospores, the overwintering structures of the pathogen, incubated at
increasing concentrations of metalaxyl-M and mandipropamid or at a single discriminatory
concentration of azoxystrobin. EC50 values (for metalaxyl-M and mandipropamid) and the
percentage of resistant oospores (for QoI) were determined to estimate resistance in field
populations. No resistance was detected for metalaxyl-M and mandipropamid, but different levels
of resistance were found for QoIs. The use of PA, CAA and QoI fungicides in mixture resulted in
reduced EC50 and percentages of resistant oospore, whereas higher rates of resistant oospores
were associated with the application of QoIs as solo formulations.
Tipologia IRIS:
03 - Contributo in volume
Keywords:
downy mildew ; grapevine ; management strategy
Elenco autori:
S.L. Toffolatti, L. Serrati, A. Vercesi
Link alla scheda completa:
Titolo del libro:
Modern fungicides and antifungal compounds VI