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Suspect herbicide-resistant kochia? Here’s what to do

Approximately two weeks after spraying, scout to check for surviving weeds that may need a second application. These weed “escapes” have a number of potential causes – from sprayer misses to low water rates.

Another common cause is herbicide resistance. In the case of kochia, herbicide resistance is a safe assumption as many kochia populations have stacked resistance to multiple groups.

One clue that could point to resistance is that the patch has no clear boundary. The patch will somewhat follow machinery pathways, as the patch often spreads by the combine or soil-moving equipment spreading the seeds. It will not have distinct boundaries that we would see in a spray miss. Another clue is that the patch is one species of weed that escaped the spray.

How to reduce the risk of herbicide-resistant weeds?
These steps can help:

  • Control weeds early.
  • Use tank mixes. Hitting weeds with two modes of action effective on each weed reduces the risk of herbicide resistant weeds escaping and setting seed.
  • Rotate herbicide mixes, using different effective modes of action on the same field and weeds.
  • Alternate between competitive and less competitive crops, and crops that have different seeding and harvest timing (winter cereals, for example).
  • Use the right herbicide at the right rate and apply at the right time. Cutting rates, for example, may reduce herbicide efficacy and increase weed seed return to the soil seed bank.
  • Employ other integrated weed management practices so herbicides are not the only method of weed management used on the farm. Visit the Canola Encyclopedia weed management chapter to learn more.

How to contain a patch of resistant weeds?

  • Use a localized spray with a different product to get rid of it.
  • Use mechanical means (tillage, mowing, hand pulling) to remove weeds before they set seed.
  • Adjust herbicide and cropping practices so that weeds can be sprayed with multiple modes of action that are effective on that patch and other at-risk weeds.

How to ensure a successful resistance test?
Group 9 resistant kochia is now widespread on the Prairies. To find out for sure, submit suspected glyphosate resistant kochia plants to the PSI lab for tissue testing to confirm resistance.

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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.