scholarly journals Fungi occurrence on seeds of field pea

2013 ◽  
Vol 43 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Joanna Marcinkowska
Keyword(s):  
Pisum Sativum ◽  
Environmental Conditions ◽  
Alternaria Alternata ◽  
Agar Medium ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
General Level ◽  
Stemphylium Botryosum ◽  
Fusarium Poae ◽  
Ascochyta Pisi

Seeds of four edible cultivars of <em>Pisum sativum</em> and three fodder harvested in 2004-2006 from eight localities, scattered in all region suitable for pea production in Poland, were evaluated for fungi occurrence on CN agar medium in Petri plates. The highest number (27) of species was isolated in 2004, while the lowest (16) in 2006. Number of fungi inhabiting seeds was influenced mainly by environmental conditions of locality and years. <em>Alternaria alternata</em> dominated in each sample of 450 seeds. Species of <em>Penicillium</em> contaminated seeds as the next and infection by <em>Stemphylium botryosum</em> was at similar level. <em>Fusarium poae</em> was the most often occurring species of this genera. Pea specific pathogens: <em>Mycosphaerella pinodes, Phoma pinodella</em> and <em>Ascochyta pisi</em> infected more seeds in 2004 and 2005 than 2006, and at the last season only <em>A. pisi</em> was noted. In general, level of infection by those pathogens was low, reaching on an average only 2.56%, with the highest for A. pisi, and the lowest for <em>M. pinodes</em>.

scholarly journals Micromycetes on Pisum sativum var. arvense

2014 ◽  
Vol 32 (1) ◽  
pp. 31-39
Author(s):  
Joanna Marcinkowska
Keyword(s):  
Pisum Sativum ◽  
Botrytis Cinerea ◽  
Sclerotinia Sclerotiorum ◽  
Alternaria Alternata ◽  
Agar Medium ◽  
Mycosphaerella Pinodes ◽  
Stemphylium Botryosum ◽  
Number Of Species ◽  
Fusarium Poae ◽  
The Common

Seeds of 11 Austrian winter pea genotypes, harvested at Radzików (CEP) in 1993 and 1994, were evaluated for fungi occurrence on Coon's agar medium in Petri plates. Number of species isolated depended on the genotype and year of collection. <i>Alternaria alternata, Stemphylium botryosum</i> were found on all the tested samples and <i>Phoma pinodella</i> and <i>Fusarium poae</i> were also common while <i>Botrytis cinerea, Sclerotinia sclerotiorum</i> and <i>Mycosphaerella pinodes</i> appeared to be common only in 1993. Three species occurred only once. The mycoflora was richer in 1993. The common seed inhabitants usually transmitted higher percentage of fungi than species occuring more seldom.

scholarly journals Yariability of dry seed mycobiota of Pisum sativum

2014 ◽  
Vol 33 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Joanna Marcinkowska
Keyword(s):  
Pisum Sativum ◽  
Pathogenic Fungi ◽  
Mycosphaerella Pinodes ◽  
Stemphylium Botryosum ◽  
Cladosporium Herbarum ◽  
Fusarium Poae ◽  
Ascochyta Pisi ◽  
Pea Seeds

Mycobiota of dry pea seeds of cv. Ramir and line R 429/87 harvested at Radzików, Oleśnica Mała and Łagiewniki in 1991—93 was investigated. Among twenty species <i>Alternaria aliernata</i> and <i>Stemphylium botryosum</i> occurred commonly each year. <i>Mycosphaerella pinodes, Ascochyta pisi, Fusarium poae</i> and <i>Cladosporium herbarum</i> were noted on most of the tested seed samples. Percentage of sccee transmitting the fungi varied depending on locations, time and genotypes, being the lowest for Łagiewniki and in 1992. The year 1991 was the most favourable for seed mycobiota development, especially for pathogenic fungi.

Importance of seed-borne inoculum in the etiology of the Ascochyta blight complex of field peas (Pisum sativum L.) grown in Victoria

1995 ◽  
Vol 35 (4) ◽  
pp. 525 ◽  
Author(s):  
TW Bretag ◽  
TV Price ◽  
PJ Keane
Keyword(s):  
Pisum Sativum ◽  
Ascochyta Blight ◽  
Mycosphaerella Pinodes ◽  
Seed Infection ◽  
Seeding Rate ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Ascochyta Pisi ◽  
Growing Region ◽  
Seed Infestation

Fungi associated with the ascochyta blight complex of field peas were isolated from 436 of 691 seedlots tested. Of the fungi detected, 94.8% of isolates were Mycosphaerella pinodes, 4.2% Phoma medicaginis, and 1.0% Ascochyta pisi. The levels of infestation of seed varied considerably from year to year and between seedlots, depending on the amount of rainfall between flowering and maturity. Within a particular pea-growing region, the level of seed-borne infection was often highest in seed from crops harvested latest. In addition, crops sown early were usually more severely affected by disease than late-sown crops, and this resulted in higher levels of seed infection. There was no correlation between the level of seed infestation by M. pinodes and the severity of ascochyta blight; however, where the level of seed infection was high (>11%) there was a significant reduction in emergence, which caused a reduction in grain yield. It may therefore be possible to use seed with high levels of seed-borne ascochyta blight fungi, provided the seeding rate is increased to compensate for poor emergence.

AAC Asher field pea

2020 ◽  
Author(s):  
Dengjin Bing ◽  
Don Beauchesne ◽  
Debra L. McLaren ◽  
Richard Cuthbert ◽  
Hamid Naeem
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Seed Weight ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Western Canada ◽  
Erysiphe Pisi ◽  
Lodging Resistance ◽  
Pisum Sativum L ◽  
Thousand Seed Weight

AAC Asher is a semi-leafless, medium to large seeded yellow cotyledon field pea (Pisum sativum L.) variety developed at Agriculture and Agri-Food Canada, Lacombe Research and Development Centre, Lacombe, Alberta, Canada. It has high yielding potential, early to medium maturity and good lodging resistance. AAC Asher has maturity of 94 days, and one-thousand-seed weight of 257 g. AAC Asher is resistant to powdery mildew (caused by Erysiphe pisi Syd.), moderately tolerant to mycosphaerella blight (caused by Mycosphaerella pinodes) and fusarium wilt (caused by Fusarium oxysporum). AAC Asher is adapted to all field growing regions in western Canada.

INTERACTION OF VARIETY AND ENVIRONMENT IN FIELD PEA TRIALS

1968 ◽  
Vol 48 (4) ◽  
pp. 405-408
Author(s):  
H. Tyson ◽  
N. R. Bradner ◽  
F. Gfeller
Keyword(s):  
Pisum Sativum ◽  
Environmental Conditions ◽  
Field Pea ◽  
Pisum Sativum L ◽  
Yield Trials

Yield trials of field pea (Pisum sativum L.) varieties were examined to extract the interactions of the varieties with locality and year. In addition, the contributions of each variety to these interactions were calculated; these contributions, when ranked, did not, however, correlate significantly with the rank of the varieties’ mean yields over all the tests. The interaction of variety by location by year was significant, and indicated that the varieties responded to particular combinations of environmental conditions.

Fungicidal control of ascochyta blight of field pea

1996 ◽  
Vol 76 (1) ◽  
pp. 67-71 ◽  
Author(s):  
T. D. Warkentin ◽  
K. Y. Rashid ◽  
A. G. Xue
Keyword(s):  
Pisum Sativum ◽  
Key Words ◽  
Untreated Control ◽  
Seed Weight ◽  
Ascochyta Blight ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Yield Increase ◽  
Pisum Sativum L

The use of fungicides for the control of ascochyta blight in field pea was investigated. Four fungicides were applied to the cultivars AC Tamor and Radley at two locations in Manitoba in 1993 and 1994. Fungicides were applied either once, twice, or three times at 10-d intervals, beginning at the initiation of flowering. Chlorothalonil and benomyl were effective m reducing the severity of ascochyta blight and increasing the yield and seed weight of field pea. The triple application of chlorothalonil resulted in a mean yield increase of 33% over that of the untreated control. Iprodione and propiconazole were relatively ineffective in controlling ascochyta blight. The percentage of seedborne ascochyta was not significantly affected by fungicide treatments. The severity of ascochyta blight was greater in 1993 that in 1994, resulting in greater benefits of chlorothalonil and benomyl applications in 1993. Key words: Field pea, Pisum sativum L., ascochyta blight, Mycosphaerella pinodes, fungicide

scholarly journals Occurrence of pathotypes of Ascochyta pisi (Lib.) in the Olsztyn district

2013 ◽  
Vol 44 (1-2) ◽  
pp. 5-22
Author(s):  
Helena Furgał-Węgrzycka
Keyword(s):  
Botrytis Cinerea ◽  
Alternaria Alternata ◽  
Stemphylium Botryosum ◽  
Field Peas ◽  
Microscopic Features ◽  
Sordaria Fimicola ◽  
Ascochyta Pisi

The causal agents of leaf and pods spot-pot of peas and field peas in the Olsztyn district was the fungus <i>Ascochyta pisi</i> (Lib.). Investigated isolates of <i>A. pisi</i> differed by macroscopic and microscopic features. From diseases leaves and pods of peas and field peas obtained also saprophitic fungi among which <i>Alternaria alternata, Botrytis cinerea, Cladosporium c1adosporioides, Epicoccum purpurascens, Stemphylium botryosum, Sordaria fimicola</i> and <i>mycelia starilia</i> were dominated. In the study of the identification and distribution of pathotypes of <i>A. pisi</i> five pathotypes were identified among which pathotype 2 were dominated. The identified the pathotypes differed by macroscopic and microscopic features.

Effects of timings of inoculation with Mycosphaerella pinodes on yield and seed infection of field pea

1997 ◽  
Vol 77 (4) ◽  
pp. 685-689 ◽  
Author(s):  
A. G. Xue ◽  
T. D. Warkentin ◽  
E. O. Kenaschuk
Keyword(s):  
Pisum Sativum ◽  
Seed Weight ◽  
Field Experiments ◽  
Control Program ◽  
Seed Transmission ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Yield Reduction ◽  
Seed Infection ◽  
Flowering Stage

Inoculated field experiments were carried out in 1994 and 1995 to study the effect of the timing of inoculation with Mycosphaerella pinodes (Berk. & Bloxam) Vestergren on disease development, yield reduction and seed infection, in three field pea (Pisum sativum L.) cv. Bohatyr, cv. Scorpio and cv. Triumph. The greatest impact of inoculation on all disease and yield parameters was at the 8–10 node stage in 1994, and at the mid-flowering stage in 1995. The lowest impact of inoculation was at the pod swell stage for both years. When inoculated at 8–10 nodes, mid-flowering and pod swell stages, M. pinodes reduced yield by 31, 24 and 19%, respectively, in 1994 and 33, 43 and 30%, respectively, in 1995. The 1000-seed weight was not affected by the timing of inoculation; however, all inoculations reduced seed weight in both years. Plant-to-seed transmission of M. pinodes was affected by the timing of inoculation in 1994, but not in 1995. Results of this study suggest that prevention of early infection by M. pinodes will provide the best economic return in a mycosphaerella blight control program on field pea. Key words: Mycosphaerella blight, Mycosphaerella pinodes, field pea, Pisum sativum, yield reduction

Ascochyta Blight of Peas

2011 ◽  
Vol 12 (1) ◽  
pp. 29 ◽  
Author(s):  
Linnea G. Skoglund ◽  
Robert M. Harveson ◽  
Weidong Chen ◽  
Frank Dugan ◽  
Howard F. Schwartz ◽  
...  
Keyword(s):  
North Dakota ◽  
Ascochyta Blight ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Growth Stages ◽  
Southwest Asia ◽  
Cool Season ◽  
Foliar Diseases ◽  
Ascochyta Pisi ◽  
Serious Disease

Field pea is an annual, cool-season legume native to northwest to southwest Asia. It was among the first crops cultivated by man. 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 the disease and the pathogens involved. Accepted for publication 28 January 2011. Published 30 March 2011.

Partial resistance to Mycosphaerella pinodes in field pea

2001 ◽  
Vol 81 (3) ◽  
pp. 535-540 ◽  
Author(s):  
A. G. Xue ◽  
T. D. Warkentin
Keyword(s):  
Pisum Sativum ◽  
Key Words ◽  
Partial Resistance ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Seed Infection ◽  
Low Area ◽  
Stem Infection ◽  
Progress Curve ◽  
Field Plots

The responses of 335 field pea lines originating from more than 30 countries to mycosphaerella blight caused by Mycosphaerella pinodes were evaluated in inoculated field plots in 1994 and 1995. Seven lines (Baccara, Carneval, Danto, Majoret, Miko, PI273605, and Yellowhead) with low area under the disease progress curve (AUDPC) scores were identified. These seven lines, along with the resistant check, Radley, and the susceptible check, 89–195, were further examined for components of partial resistance to the disease in 1996 and 1998. Components evaluated were leaf area with symptoms (LAS), stem area with symptoms (SAS), pod area with symptoms (PAS), and percent seed infection (SI). Differences among pea lines were found in all components. Compared with the susceptible check, Carneval had significantly lower LAS, PAS, and SI in both years and was considered partially resistant to leaf, pod, and seed infection; Danto had significantly lower LAS, SAS, and PAS and was partially resistant to leaf, stem, and pod infection; Yellowhead had significantly lower SAS, PAS, and SI and was partially resistant to stem, pod, and seed infection; Majoret had significantly lower LAS and SAS and was partially resistant to leaf and stem infection; Miko had significantly lower SAS and PAS and was partially resistant to stem and pod infection; PI273605 had significantly lower PAS and SI and was partially resistant to pod and seed infection; and Baccara and Radley had significantly lower SAS and were partially resistant to stem infection only. Plots of Baccara and Yellowhead inoculated with M. pinodes-infected stubble had 10 and 17% reduction in yield, respectively, compared with non-inoculated and fungicide-treated plots and, thus, were considered tolerant to the disease. The remaining lines had yield reductions of 30 to 49%. Key words: Mycosphaerella blight, Mycosphaerella pinodes, Pisum sativum, field pea, partial resistance, disease tolerance

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