Fluopicolide is a fungicide used in agriculture to control diseases caused by oomycetes such as late blight of potato.

[1] The precise mode of action is not known, but it is thought to act by affecting spectrin-like proteins in the cytoskeleton of oomycetes.

[1][2] This mode of action differs from other available fungicides used to control oomycetes and it can inhibit the growth of strains that are resistant to phenylamides, strobilurin, dimethomorph and iprovalicarb.

[2] It affects the motility of zoospores, the germination of cysts, the growth of the mycelium and sporulation.

[5] The median lethal dose in rats is >5000 mg/kg meaning that fluopicolide has low acute toxicity.