Tan Spot

Pyrenophora tritici-repentis

Tan spot is most commonly seen in South Canterbury. The lower leaves develop small brown lesions with a well-defined yellow border. Later the lesions are generally larger, with a dark centre but retaining the yellow border.

Look out for:

• Brown lesions with a well-defined yellow border and often a dark centre

Risk Factors:

• Cultivar choice
• Cool, moist conditions

Tan spot spores are released from infected crop debris in early spring and can develop rapidly, especially during warm, wet weather.Yield losses of 30% have been recorded