U of G team members Emily Duenk (right), Hannah Symington (left) and Marinda Gras (back) calibrate a sprayer so it delivers the right amount of water.

It’s not exactly a varsity sport, but training and competing in the annual “weed Olympics” can be equally gruelling. 

The Northeastern Collegiate Weed Science Contest, an annual event that pits the finest plant science students against one another in tough but friendly competition, is set to return this week after a two-year hiatus due to the pandemic.

A team of close to 20 students from the University of Guelph’s Ontario Agricultural College will face off against some of the biggest schools in the U.S., including Cornell, Pennsylvania State, Rutgers, Virginia Tech, and North Carolina State. 

Though the contest might be little-known to those outside of agricultural science, the Weed Science Contest has been held almost every year for the last 40 years. And yes, both the event and its name still elicit a few chuckles from outsiders. 

“It sounds so nerdy when you explain to your friends. ‘Yeah, I’m going to this competition to compete in weed identification and sprayer calibration events’,” said 2022 U of G Weed Team member Marinda DeGier. “But it’s actually a lot of fun and a great way to practise what we’ve been learning.” 

DeGier, a first-year master of plant agriculture student, is competing in the event for the second time after attending as a third-year crop science undergrad.  She said it takes weeks of training to prepare for the events, which also includes in-field problem solving and herbicide identification.  

Help students apply their skills in weed science 

A woman earing a large brimmed hat walks along a field with a 4-nozzle sprayer and a canister
Team member Emily Duenk practising the sprayer calibration walk

The latter event presents competitors with a small crop plot that has been treated with a mystery herbicide and students must determine which has been used based on the symptoms of the plants. 

“It’s very challenging — a lot more than you might think. To look at a field plot and try to figure out what weeds are missing, what herbicide would have been used, it’s not easy,” said DeGier. 

The mission of the Weed Science Contest is to help students broaden their applied skills in weed science and apply their knowledge, said Dr. Clarence Swanton, a now-retired professor in the Department of Plant Agriculture who coached the U of G Weed Team to many victories over more than 30 years before colleague Dr. Francois Tardif took over just before the pandemic. 

“These students are gaining invaluable experience in on-farm agronomy, taking what they’ve learned in the classroom and literally bringing it to the field,” said Swanton, who noted that U of G teams consistently place in the Top 3 in several categories. 

The event is also a great networking event, with top industry experts serving as judges. After a full day of competition, students are awarded their prizes at an evening banquet that also offers the opportunity to mingle with others in the field. 

Demand for weed science expertise growing 

Three people stand and examine a field during the portion of the Weed Contest
Competitors examine a field during the in-field problem-solving portion of the Weed Contest

Tardif said the demand for expertise in weed science is growing, given the challenges of climate change and invasive species.  

“Training new experts in weed science who have real-life experience to face these challenges is invaluable,” said Tardif. 

U of G is once again the only Canadian entrant in the competition and this year, serves as co-host, along with Syngenta Canada Inc., which will hold the event at its Honeywood Research Facility in Plattsville, Ont. 

This is also the first time in close to 20 years the contest is being held in Canada. Typically, the U of G team travels to the U.S., Swanton said. 

“What I can tell you is that when you cross the border and explain to the guards where you’re headed, it’s a good idea not to tell them that you’re headed to the ‘weed Olympics’,” he said, with a laugh. 

The Northeastern Collegiate Weed Science Contest will be held July 27. 


Dr. François Tardif