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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Seed infection with A. It was also hypothesized that low levels of seed coat staining would be indicative of no or a low incidence of embryo infection with A. Introduction Ascochyta blight, posi 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, Ascochyta blight of peas is one of the most important diseases of pea in terms of acreage affected.
This pathogen needs cool, moist conditions, and development occurs more quickly as plant tissues age.
There were no significant differences in P. From Wikipedia, the free encyclopedia. Considering that the pathogen is not readily isolated from soil Wallen et al. Specimens and strains links: Ascochyta pisi is a fungal plant pathogen that causes ascochyta blight on peacausing lesions of stems, leaves, pixi pods.
First report of Phoma glomerata associated with the ascochyta blight complex on field pea Pisum sativum in Australia. Identity and recovery of seed-borne fungal pathogens of field peas in Western Australia.
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More than one fungal species can cause this disease. Abstract The leaf-spot pathogens, Ascochyta pisi and Mycosphaerella pinodesboth cause limited, necrotic lesions in detached pea leaflets suspended above water. Indeed, such research would be complicated by the fact that P. Factors limiting the survival of Ascochyta spp. Each Petri dish was assessed for infection and fungal growth was morphologically identified to the species level for A.
An increase in severity of infection is often noted when the crop canopy closes due to the dense growth that prevents dry air from penetrating the canopy. Click here for additional data file.
Bernard Ascochta 1 and Dr. These same symptoms can also be caused by Ascochyta pinodesand the two fungi are not easily distinguishable. Other fungal links Bibliography links General links Molecular links Specimens and strains links.
Samples were combined to ascochjta A. In the early s, a resurgence of A. At harvest, seed yields were determined for each plot, seeds were assessed for thousand seed weight TSW and the incidence of seed infection with pathogens.
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Inthe pea variety Century originally released as Creamette [ Gfeller and Pisj, ] was introduced and quickly gained in acreage due to its high level of resistance to A. Field experiments were ascpchyta in the Canadian province of Saskatchewan in May at Outlook, Saskatoon, and Milden where levels of A.
National Center for Biotechnology InformationU. 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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Assessment of the Effect of Seed Infection with Ascochyta pisi on Pea in Western Canada
The conidia are spread ascochyyta distances by wind and rain. Receive exclusive offers and updates from Oxford Academic. Final modeling of A.