Assessment of yield loss caused by mycosphaerella blight in field pea crops in western Canada

2006 ◽  
Vol 113 (6) ◽  
pp. 267-274 ◽  
Author(s):  
H. Su ◽  
S. F. Hwang ◽  
K. F. Chang ◽  
R. L. Conner ◽  
A. G. Xue ◽  
...  
Keyword(s):  
Yield Loss ◽  
Field Pea ◽  
Western Canada

scholarly journals Effect of mancozeb on the control of mycosphaerella blight of field pea

2000 ◽  
Vol 80 (2) ◽  
pp. 403-406 ◽  
Author(s):  
T. D. Warkentin ◽  
A. G. Xue ◽  
D. W. McAndrew
Keyword(s):  
Yield Loss ◽  
Foliar Application ◽  
Genetic Resistance ◽  
Similar Efficacy ◽  
Field Trials ◽  
Field Pea ◽  
Mycosphaerella Pinodes ◽  
Western Canada ◽  
Flowering Stage ◽  
Plot Design

Mycosphaerella blight (MB) [Mycosphaerella pinodes (Berk. & Blox.)Vestergr.] causes substantial yield loss to field pea in western Canada in most seasons and is a disease for which genetic resistance is lacking. The objective of this research was to evaluate the effectiveness of foliar application of mancozeb for the control of MB of field pea. Field trials of split-plot design were conducted at two sites per year from 1996 to 1998 in southern Manitoba, with cultivars as main-plots and fungicide treatments as sub-plots. In most site-years, a single application of mancozeb at the early flowering stage was effective in reducing MB severity and in increasing yield. Mancozeb had similar efficacy to chlorothalonil, the only currently registered fungicide for control of MB in field pea. The beneficial effect of both fungicides was greater for the highly MB susceptible cultivars AC Tamor and Carrera than the moderately MB susceptible cultivar Radley. Key words: Pisum sativum, field pea, mycosphaerella blight, mancozeb, chlorothalonil

DS Admiral field pea

2002 ◽  
Vol 82 (4) ◽  
pp. 751-752 ◽  
Author(s):  
L. Andersen ◽  
T. Warkentin ◽  
O. Philipp ◽  
A. Xue ◽  
A. Sloan
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Powdery Mildew Resistance ◽  
Field Pea ◽  
Western Canada ◽  
Mildew Resistance ◽  
Pisum Sativum L ◽  
Cultivar Description ◽  
Good Yielding ◽  
Growing Region

DS Admiral, a yellow cotyledon field pea (Pisum sativum L.) cultivar, was released in 2000 by Agriprogress Inc., Morden, Manitoba. DS Admiral has a semileafless leaf type, powdery mildew resistance, medium sized, round seeds, and good yielding ability. DS Admiral is adapted to the field-pea-growing region of western Canada. Key words: Field pea, Pisum sativum L., cultivar description, powdery mildew resistance

Progress towards no-till organic weed control in western Canada

2012 ◽  
Vol 27 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Steven J. Shirtliffe ◽  
Eric N. Johnson
Keyword(s):  
Weed Control ◽  
Faba Bean ◽  
Cover Crops ◽  
Green Manure ◽  
Crop Residues ◽  
Organic Production ◽  
Field Pea ◽  
Western Canada ◽  
No Till ◽  
Green Manure Crops

AbstractOrganic farmers in western Canada rely on tillage to control weeds and incorporate crop residues that could plug mechanical weed-control implements. However, tillage significantly increases the risk of soil erosion. For farmers seeking to reduce or eliminate tillage, potential alternatives include mowing or using a roller crimper for terminating green manure crops (cover crops) or using a minimum tillage (min-till) rotary hoe for mechanically controlling weeds. Although many researchers have studied organic crop production in western Canada, few have studied no-till organic production practices. Two studies were recently conducted in Saskatchewan to determine the efficacy of the following alternatives to tillage: mowing and roller crimping for weed control, and min-till rotary hoeing weed control in field pea (Pisum sativum L.). The first study compared mowing and roller crimping with tillage when terminating faba bean (Vicia faba L.) and field pea green manure crops. Early termination of annual green manure crops with roller crimping or mowing resulted in less weed regrowth compared with tillage. When compared with faba bean, field pea produced greater crop biomass, suppressed weeds better and had less regrowth. Wheat yields following pea were not affected by the method of termination. Thus, this first study indicated that roller crimping and mowing are viable alternatives to tillage to terminate field pea green manure crops. The second study evaluated the tolerance and efficacy of a min-till rotary harrow in no-till field pea production. The min-till rotary hoe was able to operate in no-till cereal residues and multiple passes did not affect the level of residue cover. Field pea exhibited excellent tolerance to the min-till rotary hoe. Good weed control occurred with multiple rotary hoe passes, and pea seed yield was 87% of the yield obtained in the herbicide-treated check. Therefore, this second study demonstrated that min-till rotary hoeing effectively controls many small seeded annual weeds in the presence of crop residue and thus can reduce the need for tillage in organic-cropping systems.

Seed damage and sources of yield loss by Sitodiplosis mosellana (Diptera: Cecidomyiidae) in resistant wheat varietal blends relative to susceptible wheat cultivars in western Canada

2014 ◽  
Vol 146 (3) ◽  
pp. 335-346 ◽  
Author(s):  
M.A.H. Smith ◽  
I.L. Wise ◽  
S.L. Fox ◽  
C.L. Vera ◽  
R.M. DePauw ◽  
...  
Keyword(s):  
Yield Loss ◽  
Market Value ◽  
Western Canada ◽  
Feeding Damage ◽  
Yield Losses ◽  
Wheat Varieties ◽  
Sitodiplosis Mosellana ◽  
Seed Damage ◽  
Kernel Weights ◽  
Wheat Midge

AbstractSpring wheat varieties with the Sm1 gene for resistance to wheat midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), were compared with susceptible wheat (Triticum Linnaeus; Poaceae) with respect to sources of yield loss and reduction in market value from wheat midge feeding damage. Four resistant varietal blends (90% Sm1 wheat plus 10% susceptible refuge) and four susceptible cultivars were grown in replicated experiments at eight locations in western Canada. Frequencies and 1000-kernel weights of undamaged and midge-damaged seeds were assessed before harvest by dissecting samples of ripe spikes, and after harvest in samples of cleaned grain. Spike data were used to estimate yield losses from reduced weight of damaged seeds and loss of severely damaged seeds (⩽8 mg) at harvest. Among midge-damaged seeds in spikes, few were severely damaged in resistant varietal blends, whereas most were severely damaged in susceptible cultivars. Cleaned, harvested grain of resistant varietal blends and susceptible cultivars had similar frequencies of midge damage and were assessed similar market grades. The primary benefit of midge-resistant wheat was reduced yield loss due to seed damage by wheat midge larvae. Resistant wheat did not protect against loss of market grade, but market value could increase due to larger yields.

Cutlass field pea

2004 ◽  
Vol 84 (2) ◽  
pp. 533-534 ◽  
Author(s):  
Stanford Blade, Tom Warkentin ◽  
Albert Vandenberg
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Powdery Mildew Resistance ◽  
Field Pea ◽  
Western Canada ◽  
Leaf Type ◽  
Pisum Sativum L ◽  
Crop Development ◽  
Cultivar Description ◽  
Good Yielding

Cutlass, a yellow cotyledon field pea (Pisum sativum L.) cultivar, was released in 2003 by Alberta Agriculture Food and Rural Development and the Crop Development Centre, University of Saskatchewan, for distribution to Select seed growers in Saskatchewan and Alberta through the Variety Release Committee of the Saskatchewan Pulse Growers. Cutlass has semileafless leaf type, powdery mildew resistance, medium-sized, round seeds, and good yielding ability. Cutlass is adapted to the field pea growing regions of western Canada. Key words: Field pea, Pisum sativum L., cultivar description

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.

Volunteer Barley (Hordeum vulgare) Interference in Canola (Brassica campestrisandB. napus)

Weed Science ◽  
1988 ◽  
Vol 36 (6) ◽  
pp. 734-739 ◽  
Author(s):  
John T. O'Donovan ◽  
Arvind K. Sharma ◽  
Ken J. Kirkland ◽  
E. Ann De St. Remy
Keyword(s):  
Hordeum Vulgare ◽  
Yield Loss ◽  
Field Studies ◽  
Yield Potential ◽  
Western Canada ◽  
Effect On Yield ◽  
Financial Losses ◽  
Barley Crop

The yield potential and the effect on yield loss of canola of different densities of volunteer barley were investigated at three locations in western Canada. Field studies were conducted from 1982 to 1986. Rectangular hyperbolic models based on data pooled over years, locations, and canola cultivars, and incorporating different densities of volunteer barley and canola accurately portrayed field responses in most instances. Results indicated that volunteer barley severely reduced canola yield. However, financial losses due to reduced canola yield were partly offset by the volunteer barley crop.

Economic benefits of integrated weed management systems for field crops in the Dark Brown and Black soil zones of western Canada

2006 ◽  
Vol 86 (4) ◽  
pp. 1273-1279 ◽  
Author(s):  
E. G. Smith ◽  
B. M. Upadhyay ◽  
R. E. Blackshaw ◽  
H. J. Beckie ◽  
K. N. Harker ◽  
...  
Keyword(s):  
Weed Management ◽  
Fertilizer Application ◽  
Black Soil ◽  
Field Pea ◽  
Integrated Weed Management ◽  
Western Canada ◽  
Seeding Rate ◽  
Soil Zone ◽  
Seeding Date ◽  
Common Practices

Integrated weed management (IWM) systems that combine seeding date, seeding rate, herbicide rate, and timing of nitrogen (N) fertilizer application were assessed for their economic performance in the Dark Brown and Black soil zones. A barley-field pea IWM system in the Black soil zone at Lacombe, Alberta, and a wheat-canola IWM system in the Dark Brown soil zone at Lethbridge, Alberta, and Scott, Saskatchewan, were used to assess contributions of seeding date (April or May), seeding rate (recommended or 150% of recommended), fertilizer timing (fall or spring), and in-crop herbicide rate (50% or 100% of recommended). The factorial set of treatments was applied in 4 consecutive years at each site. For barley-field pea production, the highest contribution margin (CM) (returns over variable production costs) was earned with 50% of the recommended herbicide rate, spring application of N fertilizer, seeding barley later at the high seeding rate, and seeding field pea early at the recommended seeding rate. This IWM system had a CM benefit of at least $51 ha-1 compared with current common practices. The wheat-canola system results were site specific. At Lethbridge, it was more profitable to use 50% of recommended herbicide rates and to seed both crops early, with an early seeding date being very important for canola. The CM of this IWM system was $48 ha-1 higher than current common practices. At Scott, the wheat-canola system was more profitable with spring fertilizer application, 50% of the recommended herbicide rate, and an early seeding date for canola. The best IWM system had a CM $15 to $75 ha-1 higher, depending on the year, than common practices. Our results confirmed the economic merits of using IWM practices for cereal-oilseed and cereal-pulse cropping systems in these regions of western Canada. Key words: Economic, integrated weed management, contribution margin, canola, wheat, field pea, barley

Yield loss and management of downy mildew on field pea in Alberta, Canada

2013 ◽  
Vol 46 ◽  
pp. 23-28 ◽  
Author(s):  
K.F. Chang ◽  
S.F. Hwang ◽  
H.U. Ahmed ◽  
S.E. Strelkov ◽  
R.L. Conner ◽  
...  
Keyword(s):  
Downy Mildew ◽  
Yield Loss ◽  
Field Pea

CDC Sage field pea

2006 ◽  
Vol 86 (1) ◽  
pp. 161-162 ◽  
Author(s):  
Tom Warkentin ◽  
Albert Vandenberg ◽  
Sabine Banniza ◽  
Brent Barlow ◽  
Scott Ife
Keyword(s):  
Pisum Sativum ◽  
Field Pea ◽  
Yield Potential ◽  
Western Canada ◽  
Lodging Resistance ◽  
Pisum Sativum L ◽  
Green Cotyledon ◽  
Crop Development ◽  
Cultivar Description ◽  
Release Program

CDC Sage, a green cotyledon field pea (Pisum sativum L.) cultivar, was released in 2005 by the Crop Development Centre, University of Saskatchewan for distribution to select seed growers in Saskatchewan and Alberta through the Variety Release Program of the Saskatchewan Pulse Growers. CDC Sage is a semileafless type, with powdery mildew (caused by Erysiphe pisi DC.) resistance, good lodging resistance, medium-sized, round seeds, and good yield potential. CDC Sage is adapted to the field pea growing region of western Canada. Key words: Field pea, Pisum sativum L., cultivar description

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