Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 534380
Title Reduced efficacy of fluazinam against Phytophthora infestans in the Netherlands
Author(s) Schepers, H.T.A.M.; Kessel, G.J.T.; Lucca, F.; Förch, M.G.; Den Bosch, G.B.M. van; Topper, C.G.; Evenhuis, A.
Source European Journal of Plant Pathology 151 (2018)4. - ISSN 0929-1873 - p. 947 - 960.
DOI http://dx.doi.org/10.1007/s10658-018-1430-y
Department(s) Team Schimmels, Onkruiden en Plagen
PPO/PRI Biointeractions and Plant Health
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) AUDPC - Clonal lineage - Control strategy - Fungicides - Late blight - Potato - Shirlan
Abstract Phytophthora infestans is the causal organism of potato late blight, the most important disease in potato, the second most important arable crop in Europe. The P. infestans population in Europe is well known for its sudden changes in composition. Currently it is composed of a wide variety of genotypes, some of which are dominant clonal lines while others are rare or even unique to a year or location. Fungicides play a crucial role in the integrated control of late blight. Since its introduction in the Netherlands in 1992, fluazinam has been used in late blight control strategies in ware and starch potatoes. It has a broad spectrum of activity and is effective against a range of diseases including potato late blight. Fluazinam interrupts the pathogen cell’s energy production process by an uncoupling effect on oxidative phosphorylation. It is considered to have a low resistance risk. Until recently, reduced efficacy against fluazinam was not detected in P. infestans surveys in Europe. In this paper we present the finding of a new clonal lineage (EU_33_A2) of P. infestans in the Netherlands and the reduced efficacy of fluazinam to control one of the EU_33_A2 isolates in field experiments carried out in 2011 and 2015 under high disease pressure. The potential effects of this finding on practical late blight control strategies are discussed.
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