Blackleg

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)