Response of field pea cultivars to chlorothalonil in the control of mycosphaerella blight

2003 ◽  
Vol 83 (2) ◽  
pp. 313-318 ◽  
Author(s):  
A. G. Xue ◽  
J. Charest ◽  
C. G. Davidson ◽  
D. W. McAndrew ◽  
D. J. Bing ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Key Words ◽  
Disease Severity ◽  
Seed Weight ◽  
Field Pea ◽  
Yield Potential ◽  
Mycosphaerella Pinodes ◽  
Seed Infection ◽  
Fungicide Treatment ◽  
Disease Pressure

The efficacy of chlorothalonil in controlling mycosphaerella blight in field pea was evaluated from 1998 to 2000 using 10 cultivars representing different leaf types, market classes, seed sizes, plant heights, and maturities. Significant differences ( P < 0.05) were observed among cultivars in disease severity, yield, 1000-seed weight (TSW), and seed infection each year. Cultivar × fungicide treatment interactions for these parameters were not significant in any of the 3 yr. Under both chlorothalonil treated and untreated conditions, Radley was the most resistant, while Carrera and Keoma were equally the most susceptible cultivars. A higher efficacy of chlorothalonil treatments was observed in 1999 when disease severity was greater than in 1998 or 2000. On average, chlorothalonil treatments reduced disease severity significantly in 1999 and 2000, but not in 1998. Overall, the fungicide increased yield by 6.4%, and TSW by 0.9–5.1%, which were significant in 1998 and 1999, but not in 2000. Based on 2-yr assessments of seed infection by Mycosphaerella pinodes, chlorothalonil reduced seed infection by 19.2%, which was significant in 1999, but not in 2000. Chlorothalonil treatments provide a greater benefit in years when disease pressure and yield potential are high. Key words: Field pea, Pisum sativum, mycosphaerella blight, Mycosphaerella pinodes, chlorothalonil

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

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

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

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.

The relationships among lodging, stem anatomy, degree of lignification, and resistance to mycosphaerella blight in field pea (Pisum sativum)

2005 ◽  
Vol 83 (8) ◽  
pp. 954-967 ◽  
Author(s):  
S Banniza ◽  
P Hashemi ◽  
T D Warkentin ◽  
A Vandenberg ◽  
A R Davis
Keyword(s):  
Pisum Sativum ◽  
Disease Severity ◽  
Field Experiments ◽  
Cellulose Fibre ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Cellulose Content ◽  
Stem Anatomy ◽  
Lodging Resistance ◽  
Biochemical Basis

The relationships among lodging, stem anatomy, degree of stem lignification, and resistance to mycosphaerella blight (Mycosphaerella pinodes (Berk. & Blox.) Vestergr.) in field pea (Pisum sativum L.) were investigated in field experiments in Saskatchewan from 2000 to 2002. Disease severity, lodging resistance, plant height, internode length and diameter, and the cellulose, lignin, and fibre contents of stems were measured from 9 (2000) and 20 (2001, 2002) cultivars of field pea. Significant differences were observed in resistance to mycosphaerella blight and lodging among cultivars. In all years, ‘AC Tamor’ was among those cultivars with the highest disease ratings and lodging scores, whereas ‘CDC Striker’, ‘Carneval’, and ‘Integra’ were among those with the lowest ratings. Disease severity was positively correlated with lodging scores of plants. Lodging was negatively correlated with the proportions of supportive tissue (formerly parenchyma cells in the pith periphery, which have differentiated to sclerenchyma) and xylem in stem sections, whereas disease ratings were negatively correlated with xylem. Lignin and fibre contents in pea stems were negatively correlated with both lodging and mycosphaerella blight severity. Cellulose content was also negatively correlated with lodging scores. This study establishes an anatomical and biochemical basis for further research into pea stem lodging and disease resistance. Key words: cellulose, fibre, lignin, sclerenchyma, supportive tissue, xylem.

AAC Delhi field pea

2021 ◽  
Author(s):  
Dengjin Bing ◽  
Don Beauchesne
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 Delhi is a semi-leafless, large-seeded yellow 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, medium maturity and good lodging resistance. AAC Delhi has the maturity of 95 days, and one-thousand-seed weight of 288 g. AAC Delhi is resistant to powdery mildew (caused by Erysiphe pisi Syd.), and is moderately susceptible to mycosphaerella blight (caused by Mycosphaerella pinodes) and fusarium wilt (caused by Fusarium oxysporum). AAC Delhi is adapted to all field growing regions in western Canada.

Fungicidal control of powdery mildew in field pea

1996 ◽  
Vol 76 (4) ◽  
pp. 933-935 ◽  
Author(s):  
T. D. Warkentin ◽  
K. Y. Rashid ◽  
A. G. Xue
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Seed Yield ◽  
Seed Weight ◽  
Field Trials ◽  
Field Pea ◽  
Susceptible Cultivar ◽  
Erysiphe Pisi ◽  
Pisum Sativum L ◽  
Disease Pressure

The efficacy of sulfur (Kumulus S) and myclobutanil (Nova 40W) fungicides for control of powdery mildew (Erysiphe pisi Syd) in field pea (Pisum sativum L.) was investigated in field trials at two locations in Manitoba in 1994 and 1995. Both fungicides were effective in reducing disease seventy and increasing seed yield and seed weight of the susceptible cultivar Radley. Fungicide treatments were economically beneficial when disease pressure was high. Key words: Field pea, Pisum sativum L., powdery mildew, Erysiphe pisi Syd., sulfur, myclobutanil

Field pea seeding management

2002 ◽  
Vol 82 (4) ◽  
pp. 639-644 ◽  
Author(s):  
A. M. Johnston ◽  
G. W. Clayton ◽  
G. P. Lafond ◽  
K. N. Harker ◽  
T. J. Hogg ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Seed Yield ◽  
Seed Weight ◽  
Field Pea ◽  
Yield Potential ◽  
Row Spacing ◽  
Seeding Rate ◽  
Pisum Sativum L ◽  
Seed Placement ◽  
The Impact

The impact of seed placement and seeding rate on crop yield is not clearly understood for field pea (Pisum sativum L.). A field experiment was conducted at Melfort, SK, and Lacombe, AB, in 1998 and 1999, to evaluate the effect of three seed placements (distinct row: 23 cm and 30 cm with a hoe opener; and spread band: a 20-cm spread using a 28-cm sweep on a 23-cm row spacing) and three seeding rates (50, 100, and, 150 seeds m-2) on pea seedling density, seed yield and seed weight of a leafy prostrate and semi-leafless upright cultivar. A follow-up experiment was conducted at seven sites across Saskatchewan in 2001 to further examine the influence of a wider range of seeding rates (20, 30, 40, 50, 60, 70, 80, 90, 100, and 120 target plants m-2). Pea productivity for both cultivars was not affected by the different seed placements, despite a 4 mg greater seed weight for distinct row seed placements compared with spread band placement across all 1998–1999 sites. Moreover, the absence of a seed placement by seeding rate interaction indicated that greater spacing between plants was not associated with improved pea yield when seeding rate was increased, regardless of the cultivar. Yield component compensation occurred where increased plant density from higher seeding rates reduced seed weight. In the 2001 study, seed yield benefits were small at seeding rates greater than 50 target plants m-2. There was a tendency for lower yields with seeding rates less than 50, especially at sites with higher yield potential. Yields of field peas grown under relatively weed-free conditions should be optimized with a seeding rate of 50 to 75 seeds m-2. Key words: Pea (Pisum sativum L.), plant arrangement, row spacing, opener type, seeding rate

AAC Profit field pea

2021 ◽  
Author(s):  
Dengjin Bing ◽  
Don Beauchesne ◽  
Richard Cuthbert ◽  
Hamid Naeem
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Seed Weight ◽  
Crude Protein ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Crude Protein Content ◽  
Erysiphe Pisi ◽  
Pisum Sativum L ◽  
Thousand Seed Weight

AAC Profit is a semi-leafless, yellow cotyledonary field pea (Pisum sativum L.) cultivar developed at Agriculture and Agri-Food Canada Lacombe Research and Development Centre, Lacombe, Alberta, Canada. It has a maturity of 101 d, thousand-seed weight of 218 g, and a lodging score of 4.1 on the scale of 1-9 (1=upright, 9=prostrate). The seed crude protein content of AAC Profit is 24.5%. AAC Profit is resistant to powdery mildew (caused by Erysiphe pisi), and moderately susceptible to mycosphaerella blight (caused by Mycosphaerella pinodes) and fusarium wilt (caused by Fusarium oxysporum).

AAC Chrome field pea

2019 ◽  
Vol 99 (5) ◽  
pp. 777-779
Author(s):  
Deng-Jin Bing ◽  
Don Beauchesne ◽  
Debra McLaren ◽  
Yantai Gan ◽  
Richard Cuthbert
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 Chrome is a semi-leafless, yellow cotyledon field pea (Pisum sativum L.) variety developed at the Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, AB. It has high yielding potential, medium maturity, and good lodging resistance. AAC Chrome has a maturity of 95 d and thousand-seed weight of 241 g. AAC Chrome is resistant to powdery mildew (caused by Erysiphe pisi), moderately tolerant to mycosphaerella blight (caused by Mycosphaerella pinodes), and moderately susceptible to fusarium wilt (caused by Fusarium oxysporum). AAC Chrome is adapted to all field pea growing regions in western Canada.

Sign in / Sign up

Export Citation Format

Share Document