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Ascochyta Leaf and Pod Spot

Ascochyta on a pea leaf, infection shown on a pea pod & close up of heavy disease pressure

Pathogen

Fungus

Hosts

Peas

Symptoms

Ascochyta pisi cause the development of tan coloured lesions with dark brown margins on leaves and pods, whereas Mycosphaerella pinoides produces dark brown / purple spotting on the leaves and pods plus streaking on the stem and the Phoma spp causes footrot symptoms.

Development

This seed and trash-borne disease usually causes the development of a fatal footrot and the other symptoms in seedling before infecting the surrounding crop. Pycnidia in the lesions release spores (conidia) which are spread by rain or wind-borne water droplets.

Favourable Factors

Cool, wet weather.

Importance

On peas one of the most important pea diseases as it causes seedling death, yield losses and rejection due to staining.

Control


Identification and Management of pea and bean diseases

Find out more information on the key disease threats to your pea and bean crop. For each disease you will find out the importance of the disease in terms of potential yield penalty, how to identify the disease in its early stages and our advice on the best control strategies.

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