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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You may be, however, able to change your browser settings to cause your browser to refuse cookies in general, block third party cookies or to indicate when a cookie is being sent. Importance of seed-borne inoculum in the etiology of the Ascochyta blight complex of field peas Pisum sativum L. For seed testing, seeds per plot were surface-sterilized by soaking in 0. Field experiments were established in the Canadian province of Saskatchewan in May at Outlook, Saskatoon, and Milden where levels of A.

Plantae Cryptogamae, quas in Arduenna collegit. Ascochyta blight of peas is one of the most important diseases of pea in terms of acreage affected. Inthe pea variety Century originally released as Creamette [ Gfeller and Wallen, ] was introduced and quickly gained in acreage due to its high level of resistance to A.

Seed staining category, seed components, and their interaction had significant effects on the incidence of A. Open the calendar popup.

Ascochyta pisi is a fungal plant pathogen that causes ascochyta blight on peacausing lesions of stems, leaves, and pods. Seed Component Study Seed components without staining of the seed coat were not infected with A. Seed-borne infection of other species of the ascochyta blight complex such as Phoma spp. Ascochyta pisi also infects 20 genera of plants and more than 50 plant species including soybean, sweet pea, lentil, alfalfa, common bean, clover, black-eyed-pea, and broad pisl.


In the early s, a resurgence of A. There were no significant differences in P. All data were analyzed using in SAS Version 9. Support Center Support Center. These same symptoms can also be caused by Ascochyta pinodesand the two fungi are not easily distinguishable.

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Supplementary Material The Supplementary Material for this article can be found online at: Lily Eurwilaichitr and Dr. The optimal temperature for disease establishment and development is around 20 o C. Any condition s All condition s. Cookies are small text files that contain asccohyta string of characters and uniquely identifies a browser.

A new species of Phoma causes ascochyta blight symptoms on field peas Pisum sativum in South Australia. First report of Phoma glomerata associated with the ascochyta blight complex on field pea Pisum sativum in Australia.

Register new name species, genus, family, etc Register new type specimen of existing taxa epitype, neotype, etc. Published online Jun Molecular probes readily differentiate between them, but do not allow to determine whether fruiting structures and spores are of sexual or asexual origin.

Google cookies and technologies Google Analytics: Whether seed infection is initiated by ascospores during flowering, as speculated here, will only be revealed when more is known about the life cycle of this pathogen. Detailed dates and general agronomic practices are presented in Supplementary Table S1. Among the causal agents of ascochyta blight, P.

However, based on Wallen et al.

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

Effect of ascochyta blight on the grain yield of field pea Pisum sativum grown in Southern Australia. Other Ascochyta blight pathogens have thick walled chlamydospores, which can survive for up to a few years in the soil.


Very low levels of seedling infections and no effect of A. Even though the first highly A. The impact of seed-borne inoculum is influenced by factors including rainfall and temperature, and areas with low rainfall often produce disease-free seeds in the field Bathgate et al. During the growing season, plant emergence was assessed by counting the number of seedlings per one meter plant row in four arbitrarily ascochytw rows or row segments of each plot.

Obligate or homotypic synonyms: NSK conducted the research experiments as part of his MSc thesis, he contributed to the data analyses and to drafting the manuscript. Pycnidia are easily visible in mature lesions of A.

More Spanish version Dr. Using Google Analytics, we can see what content is popular on our websites. A higher posi of A. CDC Patrick that were separated into four seed coat staining categories. It is replaced each time there is a query done.

Seeds of CDC Patrick, a green cotyledon field pea cultivar, were used for this experiment.

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To purchase short term access, please sign in to your Oxford Academic account above. CDC Ascichyta grown from seeds with incidence levels of A. The severity of symptoms caused by A. This indicates that infected seeds may be an important way for the pathogen to survive in nature.

Matches exactly Value is undefined. The host of Ascochyta pisi is the field pea Pisum sativum L.