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 pisi is a fungal plant pathogen that causes ascochyta blight on peacausing psi of stems, leaves, and pods. Effect of ascochyta blight on the grain yield of field pea Pisum sativum grown in Southern Australia. Seeds with higher seed coat staining always showed evidence of necrosis caused by P.

Except for Outlook and Mildenharvested seeds had more A. Bernard Jabas 1 and Dr. Author Contributions NSK conducted the research experiments as part of his MSc thesis, he contributed to the data analyses and to drafting the manuscript. Data of emergence, yield, TSW, disease severity and the incidence of A. Seedling emergence ranged from 10 to 24 seedlings per meter row in plots, with an overall average of 16 seedlings per meter row. Peever, Mycological Research 3: The leaf-spot pathogens, Ascochyta pisi and Mycosphaerella pinodesboth cause limited, necrotic lesions in detached pea leaflets suspended above water.

Google Wikimedia Wikipedia Wikispecies. Conflict of Interest Statement The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Effects of ascochyta blight Mycosphaerella pinodes Berk. Most users should sign in with their email address. When assessing seed components for infection, the embryo of all seeds were infected with A. Initially, other pathogens detected in seed samples were used as covariates. If the seed density is too high and planted too early, there is increased exposure to the plant pathogen. Although pseudothecia of A.


Older leaflets were more susceptible to both pathogens. Two commercial seed lots with an incidence of natural A. Role of seed infection by the Ascochyta blight pathogen of dried pea Mycosphaerella pinodes in seedling emergence, early disease development and transmission of the disease to aerial plant parts. Effects of timing of inoculation with Mycosphaerella pinodes on yield and seed infection of field pea.

No use, distribution or reproduction is permitted which does not comply with these terms. The severity of symptoms caused by A. Studies in France showed that ascospores of P.

During the growing season, plant emergence was assessed by counting the number of seedlings per one meter wscochyta row in four arbitrarily selected rows or row segments of each plot. Run Zhang 1 and Dr. CDC Patrick grown from seeds with incidence levels of A. Views Read Edit View history. The information is depersonalized and is displayed as numbers, meaning it cannot be traced back to individuals.

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These cookies allow us to see information on user website activities including, but not limited to page views, source and time spent on a website. Among the causal agents of ascochyta blight, P.

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Latest Most Read Most Cited Root and shoot variation in relation to potential intermittent drought adaptation of Mesoamerican wild common bean Phaseolus vulgaris L. Seeds were dissected into seed coat, cotyledon, and embryo. All above ground parts of the pea plant and all growth stages are susceptible to Ascochyta pisi. You do not currently have access to this article. This indicates that infected seeds may be an important way for the pathogen to survive in nature.


Studies of penetration and colonization of leaves with the aid of light and electron microscopy showed that cell-wall-degrading enzymes were involved in the formation of A.

Results suggest ascochta the disease did not progress significantly from seeds to seedlings, ascocgyta did not contribute to infection of aerial parts of the plants, and therefore infected seeds cannot be regarded as a source of inoculum in the epidemiology of this pathogen under western Canadian growing conditions.

A new species of Phoma causes ascochyta blight symptoms on field peas Pisum sativum in South Australia. Letters above columns indicate significant differences: Archived from the original on Incidence data for A.

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 ascohcyta Ascochyta Tivoli and Banniza, Jones suggested that A.

In future, it may be possible to conduct studies of this nature through a combination of sophisticated imaging technology and molecular techniques. In the presence of P. Five arbitrarily selected plants were rated in each plot and data ascochyya transformed to percentage disease severity using the class mid points.

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