Top winter wheat varieties in Manitoba – 2022

Each year, Manitoba Agricultural Services Corporation (MASC) publishes a Variety Market Share Report based on information provided by Manitoba Farmers. Not only is this information valuable to track trends and patterns, it can also be useful to farmers for marketing and cropping decisions.

In the 2022 edition, Manitoba farmers reported seeding 51,972 acres of winter wheat in the fall of 2021, up by about 15,000 acres from the previous year. Emerson was the most popular variety, seeded on 36 per cent of acres, followed by AAC Wildfire (28 per cent) and AAC Gateway (16 per cent) (Figure 1).


Figure 1: Most popular winter wheat varieties in Manitoba, based on the MASC 2022 Variety Market Share Report.

How have winter wheat varieties changed over time?

It is no surprise that winter wheat breeders are continually working to improve the varieties available to farmers, but how do past varieties stack up against new genetics?

With a short height and high yield, CDC Falcon was the long-standing favourite variety in Manitoba. In 2014, it was moved out of the Canada Western Red Winter class and into the Canada Western Special Purpose class.

Registered in 2012, Emerson has been a top variety in Manitoba in recent years, in part due to its Fusarium head blight (FHB) resistance. AAC Wildfire (registered 2015), AAC Gateway (registered 2012) and AAC Goldrush (registered 2016) are also popular varieties. See how they compare to one another in Table 1!

Table 1: CDC Falcon Canada Western Special Purpose winter wheat compared to popular Canada Western Red Winter wheat varieties in Manitoba. Variety descriptions are based on the Seed Manitoba 2022 Variety Selection Guide.


For more information, the entire market share report can be found here. The Manitoba Management Plus Program (MMPP) also has a number of Regional Analysis Tools, including the Variety Yield Data Browser, which allows past variety yield data for many crops to be filtered based on municipality or MASC risk area.

Crop nutrient management research roundup

Manitoba Crop Alliance strives to provide tools and resources to you, our farmer members, so you can make informed decisions to optimize production and minimize nutrient loss on your farm. To do so, we have funded a range of research projects that support farmers in making decisions. Check out the list below for a roundup of our research and extension efforts on the topic of nutrient management!

Optimizing Nitrogen Management Under Conditions of Extreme Moisture

Background: Manitoba farmers are no strangers to conditions of extreme moisture. The objective of this project was to develop data-based decision-support tools to help farmers assess and manage risks associated with fall nitrogen fertilizer management under extreme moisture conditions. The information developed helps indicate when extra measures to protect nitrogen are warranted, based on the risk of nitrogen losses.

Project Details | Report and Nitrogen Risk Tables

Optimum Nitrogen Fertilizer Management Strategies for High-Yielding Spring Wheat in Manitoba

Background: Manitoba farmers are growing new varieties of spring wheat and using crop management tools that improve yield potential above the spring wheat production systems in which traditional nitrogen recommendations were developed. This research evaluated the most effective rates, timing, placement and sources for nitrogen fertilizer in spring wheat.

Project Details | Factsheet

Agronomic Practices to Minimize Lodging Risk While Maintaining Yield Potential in Spring Wheat

Background: New wheat varieties come with a new set of management challenges. This project aimed to understand how new high-yielding spring wheat varieties respond to nitrogen management, PGR application and seeding rate, as well as how these factors interact to influence lodging, yield and protein.

Project Details | Factsheet 1 | Factsheet 2

On-Farm Nitrogen Management for High Yield Wheat

Background: This Research on the Farm project evaluated three different nitrogen management strategies for increasing yield and protein in new high-yield spring wheat varieties.

Summary Report

Optimum Nitrogen Fertilizer Management Strategies for Modern Corn Hybrids in Manitoba

Background: Manitoba farmers are planting corn hybrids with higher yield potential than when the last corn nitrogen recommendations were developed. This study evaluated the most appropriate rates, timing, placement and sources for nitrogen fertilizer in corn.

Project Details | Summary Report | Summary Poster

Assessing the Effects of Split Nitrogen Application in Corn

Background: This Research on the Farm project evaluated the agronomic and economic impact of split nitrogen application in corn.

2017-18 Results

Additional resources

Spring Nitrogen Application Options Factsheet

Winter Wheat Fertility Checklist for Spring

Winter Wheat Fertility Checklist for Fall

Sunflower Fertility Factsheet

Manitoba Agriculture – Profitable Nitrogen Rates for Corn

Ever considered becoming an MCA delegate?

Common Preharvest Questions in Flax

What is the staging for a preharvest or desiccation in flax?

Flax is considered physiologically mature when 75% of the bolls (in the field or on a plant) are brown and the boll segments have begun to separate. This is a visual rating that corresponds to a grain moisture content of around 30% and is known as the 75% boll turn or 75% brown boll stage.

Flax Maturity Ratings Sask Flax

Figure 1: Flax Maturity Ratings. Credit: SaskFlax

What is the difference between a preharvest aid and a desiccant?

Two types of chemicals are available to assist with flax harvest management: pre-harvest herbicides (sometimes called harvest-aids) and desiccants.

  • Pre-harvest herbicides are non-selective systemic herbicides that provide late season perennial weed control and may improve the harvestability of the crop by reducing the amount of green material in the field.
  • Desiccants are non-selective herbicides that rapidly dry down the crop and weeds to allow for an earlier harvest.

Comparison between pre harvest herbicide and desiccant characteristics Sask Flax

Figure 2: Comparison between preharvest herbicide and desiccant characteristics. Credit: SaskFlax

Can we use glyphosate as a preharvest aid?

Since it does terminate the crop, preharvest glyphosate may assist with stem dry-down and harvestability, however it is expected that the effects of glyphosate applied alone on flax dry-down can be slow and potentially inconsistent depending on environmental conditions. This all being said, at this time, it is not a recommendation of Manitoba Crop Alliance to apply glyphosate as a preharvest aid due to inconsistent results with maximum residue limit (MRL) testing. If a producer must use glyphosate, it is strongly recommended to speak with their grain buyer to determine if a glyphosate application to their flax will be a marketing concern.

What are the current registered preharvest aids and desiccants for flax in Manitoba?

Preharvest chemicals registered for use on flax Sask Flax

Figure 3: Preharvest chemicals registered for use on flax. Credit: SaskFlax

References:

SaskFlax: Preparing for Harvest, July 2018. https://www.saskflax.com/quadrant/media/Pdfs/Flax%20on%20the%20Farm/180724_July_Flax_on_the_Farm_Final.pdf

Indian Head Agricultural Research Foundation: Pre-harvest Weed Control and Desiccation Options for Flax, 2019. https://iharf.ca/wp-content/uploads/2021/04/Pre-harvest-weed-control-and-desiccation-options-for-flax.pdf

SaskFlax: Flax Markets and Maximum Residue Limits, April 2022. https://www.saskflax.com/quadrant/media/Pdfs/Flax%20on%20the%20Farm/2022/220425%20MRL%20Information-April.pdf

Article written by Morgan Cott, Agronomy Extension Specialist – Special Crops with Manitoba Crop Alliance

Head Rot Identification in Sunflowers & Harvest Management

Rhizopus Head Rot

Rhizopus rarely occurs in Manitoba and is more of a southerly disease, however it is possible to see it here after severe storms and hail, followed by very high heat. Identifying factors that separate Rhizopus from other head rots are gray mycelia with very small black structures.

Rhizopus begins as a typical “water-soaked” dark spot on the back of a sunflower head that grows into a larger watery, soft rot and then dries and turns darker brown. Eventually, heads dry down, though this occurs prematurely in comparison to healthy plants, and infected tissue shreds, exposing gray threadlike strands of mycelial growth.

Key points:

  • Enters head via wound caused by hail, most commonly
  • Water-soaked lesion on backs of sunflower head
  • Gray mycelial growth inside the diseased head, which can later present itself on the face of the sunflower head
  • Tiny black spots, about the size of a pinhead
  • 100% yield loss potential due to dropped heads

Rhizopus Dry and skeletonized head Bob Harveson University of Nebraska

Figure 1: Dry and skeletonized head (Bob Harveson, University of Nebraska)

Coarse dirty white to gray threadlike fungal growth of Rhizopus spp in sunflower head Bob Harveson University of Nebraska

Figure 2: Coarse, dirty white to gray, threadlike fungal growth of Rhizopus spp. in sunflower head (Bob Harveson, University of Nebraska)

Sclerotinia Head Rot

Sclerotinia is very common in Manitoba and in several grain crops, which makes crop rotation the best management practice for this prevalent disease. A recommendation for sunflowers is to only include it in rotation when other sclerotinia host crops have not been grown on that field for 4-7 years. Chemical control is used frequently, however due to the small window for application, coverage is difficult to rely on.

Sclerotinia presence can first be found in the field by identifying cup-shaped apothecia growing on the soil surface, which produce ascospores. Symptoms in the field include the typical tan-coloured lesions on the back of sunflower heads that may be soft to the touch. As the infection spreads, the head becomes pliable and easily torn open to reveal black sclerotia bodies amongst white mycelia. Fronts of sunflower heads may have white mycelial growth, or mould, visible between the seeds. Eventually, heads will likely shred and disintegrate leaving frayed vascular elements that appear broom-like.

Key points:

  • Cup-shaped apothecia on the soil
  • Water-soaked lesions on backs of sunflower head
  • Black sclerotia bodies inside sunflower head following disease progression
  • White mycelial growth between and on seeds
  • Shredding sunflower head, resembling a straw broom

Sclero crop1

Figure 3: Sclerotinia Head Rot Symptoms in Sunflower

Sclerotinia Sunflower Disease Cycle v1 American Phytopathology Society

Figure 5: Sclerotinia Disease Cycle, American Phytopathological Society

HARVEST MANAGEMENT IN DISEASED SUNFLOWERS

Yield loss from sclerotinia head rot in sunflowers is a result of empty seeds, rather than poor quality. In fact, it is not uncommon to find large sclerotia bodies being harvested along with seed and degrading quality in that manner.

Due to the overall degradation of disease plants, not just from sclerotinia, it is a good practice to harvest infected fields first. The diseased areas should dry down more rapidly than healthy plants and standability isn’t reliable, whether that is a result of a stalk rot or head rot. The physical breaking of stalks or dropping of heads leads directly to yield loss due to the inability to pick up the grain with a header.

Article written by Morgan Cott, Agronomy Extension Specialist – Special Crops with Manitoba Crop Alliance

Manitoba Crop Alliance announces funding for 2022 Whole Farm Research Program projects

Matthew Bakker, assistant professor, Department of Microbiology at University of Manitoba

Shaun Sharpe, research scientist, Agriculture and Agri-Food Canada

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