The activity of dicarboximide fungicides was first reported in the early 1970's (Fujinami et al. 1971) with the three key commercial products being introduced within three years; iprodione (Lacroix et al. 1974), vinclozolin (Pommer & Mangold 1975) and procymidone (Hisada et al. 1977). They are typically protectant fungicides and although some claims to systemicity have been made (Hisada et al. 1977) they are best regarded as protectant materials.
Compared to many other classes of fungicide their activity spectrum is relatively narrow, but includes species from the following genera: Botrytis, Sclerotinia, Sclerotium, Monilinia, Alternaria, Phoma, Didymella, Rhizoctonia, Laetisaria (Corticium). Current actives on the market are iprodione, vinclozolin and procymidone. They are sold alone and as components of many co-formulated mixtures.
Code | Target site of action | Group name | Chemical group | Common name | Comments |
2 | MAP/Histidine-Kinase in osmotic signal transduction (os-1, Daf1) | Dicarbox-amides | Dicarbox-amides | chlozinolate iprodione procymidone vinclozilin | Resistance common in Botrytis and some other pathogens. Several mutations in OS-1, mostly I356S. Cross resistance common between the group members Medium to high risk. See FRAC Dicarboximide Guidelines for resistance management. |