Kochia weeds have taken over Jake Leguee’s family farm near Fillmore, Sask, towering as high as his waist. This year, the lentil and flax fields, located around 100 kilometers southeast of Regina, have been overwhelmed by the invasive tumbleweed.
According to Leguee, a single kochia plant can cause extensive damage by multiplying rapidly. These weeds, known for thriving in drought conditions, are now developing resistance to herbicides, posing a significant challenge and financial burden for farmers like Leguee.
To combat the relentless spread of kochia, Leguee has been investing substantial sums, amounting to hundreds of thousands of dollars annually, in herbicides. Previously, Group 14 herbicides were effective but costly. However, even these advanced products are now failing to eliminate the resilient weeds.
Last year, Leguee purchased a $100,000 weed terminator attachment for his combine in a bid to control kochia infestations. Despite the high cost of such tools, particularly for smaller farms, the battle against kochia remains ongoing, with Leguee struggling to contain its growth.
Experts note that while kochia was previously limited to the southern prairies, its rapid expansion northward is becoming a concerning trend. Shaun Sharpe, a scientist specializing in invasive weeds at Agriculture and Agri-Food Canada, highlighted the weed’s movement into Saskatchewan and Alberta, attributing it to climate change and deforestation altering wind patterns.
To address the escalating threat posed by kochia, Agri-Food scientists like Sharpe are intensifying their efforts. Their research focuses on identifying effective control methods, educating farmers on weed identification, and monitoring other herbicide-resistant weeds like waterhemp and palmer amaranth, which are likely to spread to Saskatchewan within the next five years.
Despite ongoing research and investments in control measures, the challenge of invasive weeds like kochia remains a pressing concern for farmers, impacting crop production and profitability. Leguee, like many others, is hoping for better results in managing kochia infestations to safeguard agricultural sustainability and profitability in the face of this growing threat.
