Stem Rust

Puccinia graminis

Stem rust (Puccinia graminis) is a disease that has many species specific strains. The strain that infects ryegrass in New Zealand does not attack other species such as wheat or barley. Stem rust is favoured by warm conditions and is at its most aggressive later in the spring. Not controlled, stem rust will lead to major economic losses.

Related Pests

Crown Rust - Ryegrass Seed Crops

Puccinia coronate

Crown rust (Puccinia coronate) commonly infects ryegrass in New Zealand with the orange pustules being easily found on the foliage. The disease is favoured by warm, dry conditions and with a short life cycle the disease can develop rapidly under the right conditions. In terms of yield loss crown rust is less important than stem rust but still needs to be adequately controlled.

Stem Rust

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Related Pests

Crown Rust - Ryegrass Seed Crops

Puccinia coronate

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