Association between feeding perennial ryegrass (Lolium perenne cultivar Grasslands impact) containing high concentrations of ergovaline, and health and productivity in a herd of lactating dairy cows.

摘要: Perennial ryegrasses are frequently infected with fungal endophyte (Neotyphodium lolii) to increase the resistance of plant insect damage. Unfortunately, a side effect infection can be production alkaloids, including Lolitrem B and ergovaline, that produce toxic effects in animals. A significant 4.6 litre decrease milk herd Holstein-Friesian dairy cows was associated high concentrations ergovaline ryegrass silage. Simultaneously, SCC increased significantly over comparable period reproductive performance declined. Body condition score coat were adversely affected. Unique aspects this Case report include; very stable years before after cessation feeding silage containing ergovaline; presence silage; controlled diet reduced risks variation feed availability other sources toxins. Veterinarians farm advisors should aware potential for negative on animal health Neotyphodium lolii ergovaline.