highly toxic to native strains of western predatory mite (Galendromus occidentalis) and to parasites
contact, systemic7 (local)
medium to high
high to very high
thiram (Thiram Granuflo)
1 Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of action. Fungicides with a different mode-of-action group number are suitable to alternate in a resistance management program. In California, make no more than one application of fungicides with mode-of-actions group number with high resistance risk before rotating to a fungicide with a different mode-of-action group number; for other fungicides, make no more than two consecutive applications before rotating to fungicide with a different mode-of-action group number.
2 Qol = quinone outside inhibitor (strobilurin)
3 DMI = demethylation (sterol) inhibitor
4 DMDC = dimethyl dithiocarbamate
5 SDHI = Succinate dehydrogenase inhibitor
6 MBC = Methyl benzimidazole carbamate
7 Fungicide is generally considered to have systemic action based on performance data, but this characteristic has not been necessarily proven experimentally using more rigorous assays (e.g., radioactively labeled compounds).
8 Resistance has been found in California for certain fungicides with a single-site mode of action. To reduce the risk of resistance development, take the mode of action into account when choosing a fungicide. At the beginning of a treatment program, use a fungicide with a multi-site mode of action; for subsequent applications rotate or mix fungicides with different mode of action FRAC numbers. Use labeled rates (preferably the upper range) of the single-site fungicides, and limit the total number of applications per season.