Clover rust is caused by a complex of rust species in the Uromyces genus and is sometimes found on clover throughout NZ. It can reduce forage quality.

 

Identification

These rust pathogens produce yellow, brick-red or orange pustules on the underside of leaves and on the petioles. Pustules on petioles can cause characteristic twisting.

 

Prevention and management

Graze infected plants.

 

Rust on clover petioles (left) & leaf. (photo: MAF, Lincoln)