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Leaf stripe of oat

Pyrenophora avenae

Profile

The stripe disease of oats is caused by the fungus Pyrenophora avenae. The infestation results in striation of the leaves, reduced growth of the plant and only sporadic ear formation. It occurs mainly under humid weather conditions and can lead to considerable yield losses due to its rapid spread potential.

Damage symptoms

The fungus causes grayish brown to reddish brown streaks extending from the leaf base to the leaf tip. With increasing maturity, the leaves tear open at the stripes. Plants grow stunted and sporadic spike formation occurs, although these are usually numb and do not contain oat grains. Stripe disease of oats is easily recognizable from the time of shooting, or better, from the time of ear pushing.

Rotbraune Streifen an Blättern befallenen Wirtspflanze im Feldbestand
Streifenförmige Nekrosen auf einer Haferpflanze
Nahaufnahme eines nekrotischen Blattes
Nekrotisches Blatt einer befallenen Haferpflanze
Befallene Samen auf blaugefärbtem Filterpapier, graues Myzel mit weißen Myzelbüscheln hat sich rund um die Samen gebildet
Mit der Streifenkrankheit befallene Samenkörner inklusive Myzel des Pilzes

Host plants

Oats

Distribution

Pyrenophora avenae is widespread worldwide. Especially in warmer regions, stripe disease of oats is a common leaf spot disease.

Propagation and transmission

Infection of seedlings occurs exclusively through infected seed and especially under humid weather conditions.

Economic importance

The disease can cause significant yield losses due to its very rapid spread potential.

Prevention and control

Services

Plant Health Services

Last updated: 13.03.2024

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