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New Zealand Plant Protection 64 (2011): 119-124

Succinate dehydrogenase inhibitor (SDHI) fungicide resistance prevention strategy

A.H. McKay, G.C. Hagerty, G.B. Follas, M.S. Moore, M.S. Christie and R.M. Beresford


Succinate dehydrogenase inhibitor (SDHI) fungicides are currently represented in New Zealand by eight active ingredients: bixafen, boscalid, carboxin, fluaxapyroxad, fluopyram, isopyrazam, penthiopyrad and sedaxane. They are either currently registered or undergoing development in New Zealand for use against a range of ascomycete and basiodiomycete pathogens in crops, including cereals, ryegrass seed, apples, pears, grapes, stonefruit, cucurbits and kiwifruit. These fungicides are considered to have medium to high risk of resistance development, and resistance management is recommended by the Fungicide Resistance Action Committee (FRAC) in Europe. Guidelines are presented for use of SDHI fungicides in New Zealand to help avoid or delay the development of resistance in the fungal pathogens that they target.

Keywords: mode of action, activity group, insensitivity.

Related articles
pdfThe New Zealand Committee on Pesticide Resistance (NZCPR)
R.M. Beresford, G.B. Follas, G.C. Hagerty, K.C. Harrington and N.A. Martin (2009)
New Zealand Plant Protection 62: 393-394

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