Blackleg, blacklegs or black-legged may refer to:
Disease Blackleg (disease), in sheep and cattle Blackleg (Brassica) in rapeseed and other mustard-and-cabbage-family plants, caused by fungus Leptosphaeria maculans Blackleg (potatoes), caused by Pectobacterium carotovorum Blackleg (geraniums), caused by a form of the quasi-fungus Pythium Scurvy, vitamin deficiency in primates and some other animals
Species Black-leg, a common name for the polypore fungus Royoporus badius Black-legged kittiwake, seagull species Black-legged seriema, seriema bird species Blackleg tortoiseshell, another name for the large tortoiseshell butterfly Animals named as black-legged Black-legged tick, Ixodes scapularis and Ixodes pacificus
Other uses Blacklegs (horse), a racehorse Opelousa people, historical Native American tribe of Louisiana Blackleg labour (or strikebreaking) Card sharp Operation Blackleg, dive operation on warship HMS Coventry (D118)
See also Blackley, Manchester, England Blackledge (disambiguation) Black Legion (disambiguation)