Evaluation of a matrix to calculate fungicide resistance risk

A - Papers appearing in refereed journals

Grimmer, M. K., Van Den Bosch, F., Powers, S. J. and Paveley, N. D. 2014. Evaluation of a matrix to calculate fungicide resistance risk. Pest Management Science. 70 (6), pp. 1008-1016.

AuthorsGrimmer, M. K., Van Den Bosch, F., Powers, S. J. and Paveley, N. D.
Abstract

BACKGROUNDIn the European Union, assessments of resistance risk are required by the regulatory authorities for each fungicide product and are used to guide the extent of anti-resistance strategies. This paper reports an evaluation of a widely used risk matrix', to determine its predictive value. Sixty-seven unique cases of fungicide resistance in Europe were identified for testing the risk assessment scheme, where each case was the first occurrence of resistance in a pathogen species against a fungicide group. RESULTSIn most cases, high-, moderate- and low-risk categories for fungicide, pathogen and agronomic systems were each associated with significant differences in the number of years from fungicide introduction to the first detection of resistance (FDR time). The combined risk, calculated by multiplying the individual risk factors using the risk matrix, had useful predictive power (72.8% of FDR time variance accounted for; VAF) for all fungicides, but only limited predictive power (25.8% VAF) for single-site acting fungicides (the predominant type). CONCLUSIONThe resistance risk matrix has significant, but limited, predictive value. New fungicide modes of action, or pathogens that have become newly prevalent, cannot be assigned to risk categories until new methods of resistance risk assessment are developed. (c) 2013 Society of Chemical Industry

KeywordsAgronomy; Entomology
Year of Publication2014
JournalPest Management Science
Journal citation70 (6), pp. 1008-1016
Digital Object Identifier (DOI)doi:10.1002/ps.3646
PubMed ID24013934
Open accessPublished as non-open access
FunderChemicals Regulation Directorate (CRD) of the Health and Safety Directorate
DEFRA - Department for Environment, Food and Rural Affairs UK
Biotechnology and Biological Sciences Research Council
Funder project or codeDelivering Sustainable Systems (SS) [ISPG]
PublisherWiley
ISSN1526-498X

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