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Ascochyta blight on pea

Ascochyta pisi, Ascochyta pinodes, Ascochyta pinodella

Profile

Burn spot disease of pea is caused by fungi of the genus Ascochyta . When infection occurs, brownish spots form on leaves and pods. Severe infestation leads to yield losses and reduced quality.

Damage symptoms

Different symptoms can be visible on the leaves and pods. On the one hand, these can be reddish-brown, not sunken and blurred spots, which are up to 7 mm in size. On the other hand, they may be roundish, light brown, sunken spots surrounded by a dark, raised border (focal spots, up to 1 cm in size), which may also have dark spore containers (pycnidia) in the spots. This symptom of pest is very characteristic of burn spot disease of pea.

Hülsen mit rundlichen Flecken
Erbsenhülsen mit dunklen Flecken der Brennfleckenkrankheit
Nahaufnahme von braunen, rundlichen Flecken an einer Erbsenhülse
Deutlich eingesunkene braune Brennflecken mit dunklem Rand
Erbsensamen, die teilweise dunkle Fruchtkörper aufweisen
Mit der Brennfleckenkrankheit befallene Erbsensamen auf denen teilweise bereits Fruchtkörper (Pyknidien) erkennbar sind

Host plants

The pathogen attacks peas, beans and other legumes.

Distribution

Burn spot disease of pea occurs preferentially in moist locations.

Propagation and transmission

The pathogens are transmissible via the seed and can persist in the seed for years. Another source of infection is infested crop residues that are introduced into the soil. These also remain capable of infection for years.

Economic importance

A severe infestation of the blight disease can lead to high yield losses, a reduction in the quality of the harvested crop and contamination of the soil with the pathogens.

Prevention and control

Services

Plant Health Services

Last updated: 13.03.2024

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