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Responding to Frost Damage in Cool-Season Forages

Responding to Frost Damage in Cool-Season Forages

After extended freeze events, there are several signs of frost damage that appear in cool-season forages. Producers may observe a white, burned appearance or a yellowing or browning in the forage canopy with some green at the base of the forage. There may also be forage leaf loss and/or limpness.

Will cool-season forages recover from frost damage?

  • When determining if cool-season forages will recover after a frost, the extent of the browning in the forage canopy is important. If the forage growing points were insulated closer to soil level and there is still some green at the base of the plant, there is a greater chance of stand recovery. Soil temperatures decrease slower than above ground temperatures do, which provides some insulation for the forage canopy during cold snaps.
  • Well-established forages will handle hard freezes better than newly established stands. Newly established stands are at a greater risk of stand failure the farther north they are in Alabama.
  • Pastures and hayfields with better soil fertility conditions will help forages to recover more readily.
  • Forage varieties matter. Some forage varieties of small grains and annual ryegrass are more tolerant of hard freezes than others are. Oats are known for their cold sensitivity. However, many oat varieties may sustain significant yield losses but not be winterkilled by cold weather events.

Steps to Recovery

  • Assess the extent of damage right after the frost event and again weekly following periods of extended frost.
  • Allow time before making fertilization decisions. Monitor the stands for 30 days, and allow any regrowth to occur to determine the strength of the stand and–if enough growth occurs–to justify fertilization.
  • Graze or clip extensively damaged top growth to make room for the understory to grow back. It is important to open up the canopy to allow light to penetrate to growing points. It is important to not over graze existing stands. Do not graze below 3 to 4 inches in height. Limit grazing is a good management strategy to help decrease trampling and effectively use any standing forage.
  • Nitrate levels may be elevated in cool-season grasses that were fertilized before the extended freeze. Nitrate levels are more fixed and do not dissipate in plants following a frost. In addition to plant nitrate levels, consider supplement types.
    • Note. Do not feed nonprotein nitrogen feed supplements (i.e. urea-based products) along with stressed forages where nitrates may be of concern to further prevent risk.
  • Replant cool-season annual stands if necessary, although this can be risky in terms of establishment. Consider areas where hay has been fed because fertility is better in those areas. If conditions allow, late planting may be an option, especially for annual ryegrass.
Source : aces.edu

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How a Desire to Lead Brought This Wheat Breeder to Canada

Video: How a Desire to Lead Brought This Wheat Breeder to Canada

Gurcharn Singh Brar is a wheat breeder whose path meandered from the breadbaskets of Punjab, India, to the sprawling fields of the Prairies. In a candid conversation, Brar shared insights into his journey, the challenges faced, and the undying passion that fuels his quest for better crops.

It all began with a childhood rooted in the wheat fields of Punjab, where agriculture isn’t just a livelihood but a way of life. His fascination with wheat and its potential led him to pursue a bachelor’s degree in agricultural sciences at Punjab Agricultural University. It was during this time that he encountered the spectre of rust diseases, particularly stripe rust, which plagued the region’s wheat crops. Determined to combat this menace, he set his sights on a journey that would take him across continents.

Venturing abroad for his graduate studies, he found himself in Saskatchewan at the Crop Development Centre (CDC), working under the mentorship of renowned researchers like Randy Kutcher and Pierre Hucl. Here, he delved deep into the world of wheat genetics, focusing on stripe rust resistance — a quest that would shape his academic pursuits for years to come.

After completing his master’s and Ph.D. in six and a half years, he embarked on a professional journey that would see him traverse academia and research. From brief stints as a research officer to landing his dream faculty position at the University of British Columbia’s Plant Science program, his career trajectory was marked by a strong drive to make a difference in the world of wheat.

Despite the allure of British Columbia’s unique agricultural landscape, he found himself wanting to return to the vast expanses of the Prairies, where wheat reigns supreme. He recently returned to the Prairies and is the new wheat breeder at the University of Alberta in Edmonton.

“The opportunity to lead an established wheat breeding program at the University of Alberta was a dream come true. With the necessary resources and infrastructure in place, I’m excited to drive innovation and develop high-yielding wheat varieties tailored to the unique conditions of northern Canada,” he says.

Brar, one of Seed World Canada‘s 2024 Next-Gen Leaders, has become known for identifying novel sources of resistance to priority diseases and his efforts in developing wheat germplasm with multiple disease-resistant traits.

In addition to his groundbreaking research, Brar is committed to mentoring the next generation of agricultural scientists.

“I believe in nurturing talent and empowering students to pursue their passions,” he says. “Watching my students grow and thrive in their research endeavours is hugely rewarding.”

As he looks ahead, Brar’s vision for the future of wheat breeding is clear: “My number one target is to develop high-yielding wheat varieties adapted to the northern climates of Canada. By focusing on early maturity and strong straw traits, we can maximize yield potential while ensuring resilience to environmental challenges.”

His decision to also join the Prairie Recommending Committee for Wheat, Rye, and Triticale (PGDC) executive as member-at-large came from a desire to play an even more important role in the world of Canadian cereals.