The leaf-spot pathogens, Ascochyta pisi and Mycosphaerella pinodes, both cause limited, necrotic lesions in detached pea leaflets suspended above wat. Ascochyta pisi Lib., Plantae Cryptogamae, quas in Arduenna collegit Fasc. 1: 12 ( ) [MB#]. The anamorphic pycnidial fungus Ascochyta pisi is one member of a species complex that causes Ascochyta blight of pea, a potentially devastating disease.

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Assessment of the Effect of Seed Infection with Ascochyta pisi on Pea in Western Canada

Ascochyta blight, also referred to as the ascochyta blight complex, is one of the major diseases affecting field pea production and can be caused by several pathogens with anamorphs in the genus Ascochyta Tivoli and Banniza, Seeds were dissected into seed coat, cotyledon, and embryo. Introduction Ascochyta blight, also referred to as the ascochyta blight complex, is one of the major diseases affecting field pea production and can be caused by several pathogens with anamorphs in the genus Ascochyta Tivoli and Banniza, There was also no effect on seed yield, seed size or the infection levels with this pathogen of harvested seeds.

This creates a cool, humid, moist environment under the canopy, and as a result, the disease symptoms are most prevalent at the base of the canopy and spread up the plant. Experiments were designed as randomized complete block designs with four replicates.


To date, no studies have been conducted to determine whether pseudothecia develop under field conditions, nor have there been attempts to trap ascospores of this species. Neoformation and summer arrest are common sources of tree plasticity in response to water stress of apple cultivars.

Mycosphaerella pinodesAscochyta pisiand Phoma pisl have been associated with this disease.

Close mobile search navigation Article navigation. Published online Jun Current name Classification Type name Basionym Obligate or homotypic synonyms Anamorph synonyms Teleomorph synonyms Facultative or heterotypic synonyms Type of organism. Only incidence data of Epicoccum spp. Explaining the larger seed bank of an invasive shrub in non-native versus native environments by differences in seed predation and plant size.

Journal List Front Plant Sci v. Effect of ascochyta blight Mycosphaerella pinodes on yield components of single pea Pisum sativum plants under field conditions.

Molecular probes readily differentiate between them, but do not allow to determine whether fruiting structures and spores are of sexual or asexual origin. Precipitation during the growing seasons of to at experimental locations was average or above average, so conditions generally were conducive for the initiation of epidemics.

Samples were combined to obtain A. ascocbyta

Assessing seed components of seeds with varying levels of A. All data were analyzed using in SAS Version 9. A much more significant impact of A. Field experiments were established in the Canadian province of Saskatchewan in May at Outlook, Saskatoon, and Milden where levels of A.


Ascochyta pisi – Wikipedia

CDC Patrick that were separated into four seed coat staining categories. The average severity of A. The latter also included a small number of underdeveloped and shriveled seeds assumed to be caused by A.

Each seed was assessed for infection by A. Effects of timing of inoculation with Mycosphaerella pinodes on yield and seed infection of field pea.

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One method to manage disease is to follow the recommended seeding dates and rates to avoid fostering an xscochyta environment for the pathogen. Contains Matches exactly Value is undefined. Plot size was 1. To purchase short term access, please sign in to your Oxford Academic account above.

A negligible impact of A. Cookies mentioned in the last point are Google analytics cookies that are IP anonymized which means that we cannot trace single ascochyt. In future, it may be possible to conduct studies of this nature through a combination of sophisticated imaging technology and molecular techniques.

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Older leaflets were more susceptible to both pathogens. Bars indicate standard errors of the mean.

Run Zhang 1 and Dr. This Add-on is available at http: