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2 edition of Interactions between Ascochyta pisi (Lib.) pathotypes and Pisum genotypes. found in the catalog.

Interactions between Ascochyta pisi (Lib.) pathotypes and Pisum genotypes.

Peter Darby

Interactions between Ascochyta pisi (Lib.) pathotypes and Pisum genotypes.

by Peter Darby

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Published by University of East Anglia in Norwich .
Written in English


Edition Notes

Thesis (Ph.D.) - University of East Anglia, School of Biological Sciences, 1982.

ID Numbers
Open LibraryOL14512317M

  The expression of partial resistance in pea to ascochyta blight (caused by Mycosphaerella pinodes) was studied in a detached stipule assay by quantifying two resistance components (fleck coalescence and lesion expansion) using the method of point inoculation of stipules. Factors determining optimal conditions for the observation of partial resistance are spore Cited by: This page was last edited on 22 May , at Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may using.

Didymella pinodes is the principal causal agent of ascochyta blight, one of the most important fungal diseases of pea (Pisum sativum) worldwide. Understanding its host specificity has crucial implications in epidemiology and management; however, this has not been clearly delineated yet. In this study we attempt to clarify the host range of D. pinodes and to compare it with that of other close Cited by: 8. In a disease complex, different pathogen species cause similar symptoms on a common host plant species. These pathogens commonly develop simultaneously in a field and can then infect the same host individuals. Co-occurring pathogens may affect each other, through antagonism and/or synergism. An important question is the ecological and pathological consequences of co-occurrence of pathogenic Cited by:

The crop is grown primarily in North Dakota, Washington, Montana, Idaho, Oregon, and southern Canada. Ascochyta blight is a serious disease affecting above ground portions at all growth stages. Stem, crown, pod, and foliar diseases of pea are caused by a complex of Ascochyta pisi, Mycosphaerella pinodes, and Phoma pinodella. This paper reviews. Didymella pisi Name Homonyms Ascochyta pisi Lib., Common names 碗豆囊二孢菌 in language. ärtfläck in Swedish Bibliographic References. Chen, Q. & al. () Resolving the Phoma enigma. Studies in Mycology


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Interactions between Ascochyta pisi (Lib.) pathotypes and Pisum genotypes by Peter Darby Download PDF EPUB FB2

Hosts and Interactions between Ascochyta pisi book. The host of Ascochyta pisi is the field pea (Pisum sativum L.).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 bean.

Field pea is an annual, cool season legume that is native to northwest and southwest Asia. Ascochyta blight of peas is one of the Family: Didymellaceae.

The anamorphic pycnidial fungus Ascochyta pisi is one member of a species complex that causes Ascochyta blight of pea, a potentially devastating disease. The teleomorphic state of this fungus was induced under laboratory conditions.

Using morphological and molecular characters, we placed the teleomorph within the genus Didymella as D. pisi and describe a heterothallic mating system using a Cited by: Ascochyta blight, an infection caused by a complex of Ascochyta pinodes, Ascochyta pinodella, Ascochyta pisi, and/or Phoma koolunga, is a destructive disease in many field peas (Pisum sativum L.

The fungi that cause ascochyta blight may either be seed borne, soil borne or survive in pea trash. The disease usually becomes established when sexual ascospores of the fungus (D. pinodella), produced in perithecia on old pea stubble, are carried into the new crop by rain and wind causing early l conidia are produced by other pathogens in pycnidia (fruiting bodies) and can.

The aim of the conference was to formulate a basis for improving the pea crop by bringing together international scientists to present research findings and review published work on a wide range of subject areas encompassing pea genetics, plant breeding, agronomy, crop.

Ascochyta blight of pea is caused by four related fungi, Ascochyta pisi, Phoma koolunga, Ascochyta pinodes, and Ascochyta pinodella. The latter two taxa appear to be much more common and. General information about Ascochyta pisi (ASCOPI) EPPO Global Database. advanced search Login. Register. Toggle navigation.

Home is not responsible for any use that may be made of the information from this project subsequently included in the EPPO Global Database. Ascochyta pisi var. fabae R. Sprague, () Didymella fabae G.J. Jellis & Punith., () Ascochyta fabae is a plant pathogen.

See also. List of Ascochyta species; References. External links. USDA ARS Fungal Database This Pleosporales-related article is a stub. You can help Wikipedia by Class: Dothideomycetes. Lesions caused by A.

pisi differ from M. pinodes.A. pisi lesions are typically tan or brown in color with a distinct dark brown margin and visible pycnidia within the lesion. Pycnidia will also develop in lesions caused by M.

pinodes, but will be less obvious as they blend into the already dark lesion. Host Range. Ascochyta pisi is reported to infect 20 genera of plants and more than 50 plant. Hewett, P.D. Detection of seed-borne Ascochyta pisi Lib. and test agreement within and between laboratories.

Seed Science and Technology, 15, Leach, C.M. The quantitative and qualitative relationship of ultra violet and visible radiation to the induction of reproduction in Ascochyta pisi.

Canadian Journal of Botany. separation between the species. Previously, the placement of the genus Didymella within the Pleosporales has been unclear.

A molecular phylogeny obtained for species of Phoma and related genera, including the type species of Didymella and Ascochyta, placed A. fabae and A. pisi within a clade for which the new family Didymellaceae was. Anne Moussart: Plant and canopy architecture to control ascochyta blight epidemics in pea fields.

Sabine Banniza: Effect of pea seed infection with Ascochyta pisi on plant establishment and ascochyta blight development. Alessandro Infantino: Ascochyta lentis var. lathyri, causing a new disease of grasspea (Lathyrus sativus) in Italy. Ascochyta pisi Lib., Plantae Cryptogamae, quas in Arduenna collegit Fasc.

1: 12 () [MB#]. Picture 2. Ascochyta leaf blight symptoms of Kentucky bluegrass leaf blades. Note lower blades and crown remain healthy.

Picture 3. Ascochyta damaged turf where spores might have been spread by the mower. Picture 4 A. Ascochyta symptoms on 11 June Picture 4B.

Same lawn as Picture 4A on 21 June Picture 5A. Ascochyta symptoms on Ascochyta leaf blight results in the rapid development of large irregularly shaped, straw-colored patches on Kentucky bluegrass, and occasionally tall rescue and perennial ryegrass during the summer. Because the Ascochyta fungus is primarily a foliar pathogen, diseased turfgrass usually recovers relatively quickly.

Environmental conditions that File Size: 1MB. Ascochyta definition is - a form genus of imperfect fungi (order Sphaeropsidales) with hyaline 2-celled pycnospores formed in pycnidia located in discolored spots in leaves, stems, or fruits.

Effect of the polygalacturonase inhibitor from pea on the hydrolysis of pea cell walls by the endopolygalacturonase from Ascochyta pisi. TURNER; R. HOFFMAN; Pages: ; First Published: 01 March Ascochyta blight diseases represent serious limitations to legume production worldwide (Rubiales and Fondevilla, ; Khan et al., ).

Didymella fabae Jellis and Punith. Ascochyta pisi Pullman, USA DQ D. pinodes Canberra, Australia File Size: 1MB. A description is provided for Ascochyta pisi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts.

HOSTS: On Pisum, Lathyrus and Vicia. DISEASE: Leaf, stem and pod spot of pea (Pisum sativum) and other legumes. The leaf lesion is somewhat light brown with a darker, frequently prominent, margin and pale by: 1. Identification of Mycosphaerella (Ascochyta) blight of field peas Causal pathogens: Mycosphaerella pinodes (= Ascochyta pinodes), Ascochyta pisi, and Phoma medicaginis var.

pinodella Michael Wunsch, Plant Pathologist North Dakota State University Carrington Research Extension Center. Click on the title to browse this issue.Ascochyta Leaf Blight. Ascochyta leaf blight or spot of turfgrasses is caused by more than 80 different fungi which can cause damage to Kentucky bluegrass, bentgrasses, Italian and perennial ryegrasses, fescues (red, meadow, sheep, and tall), redtop, and many other forage, weed, and wild grasses.David B.

Collinge was a Higher Scientific Officer at the (then) John Innes Institute in Norwich (), where he studied the defence response mechanisms in Turnip (Brassica campestris) against the bacterial pathogen Xanthomonas campestris.

He moved to the then Dept. of Plant Physiology at the then KVL in as a visiting postdoctoral.