Provincial weed specialist Tammy Jones says leaving small patches of survivors can quickly result in a huge problem as new and highly competitive herbicide-resistant weeds have arrived.

Losing the war on weeds

Tammy Jones has been doing the math on where herbicide resistance is taking Manitoba farmers and the numbers are grim

Tammy Jones spent four hours last summer wrestling with about 300 waterhemp plants in a Manitoba field, yanking them out of the ground by the roots and carrying them to the field edge for destruction. The provincial weed specialist was trying to demonstrate the value of controlling what might seem to be small patches of

Manitoba Agriculture’s 2018 in-season survey now documents 12 municipalities with glyphosate-resistant kochia.

Glyphosate-resistant kochia confirmed in 12 municipalities in 2018

Testing is the only way to confirm how widespread glyphosate-resistant kochia is in Manitoba

When Tammy Jones’ phone rang last year as often as not it was farmers fed up with kochia spreading in their fields. The Manitoba Agriculture weeds specialist dubbed the tumbleweed ‘weed of 2018,’ in a talk at St. Jean Farm Days last week. “We saw a lot of it,” she said. “It felt like anyone


Palmer amaranth.

Is palmer amaranth waiting in the wings?

Experts weigh in on palmer amaranth, its climbing stats to the south, and the chance we might see the weed cropping up in Manitoba

Provincial weed specialist Tammy Jones says it’s not time to push the panic button on palmer amaranth, despite new cases reported in North Dakota. Manitoba has cast a closer eye to the situation now that the noxious weed has been spotted in the neighbouring state. “We knew it was in South Dakota, so the expectation

Palmer amaranth. (United Soybean Board photo)

North Dakota still on lookout for Palmer amaranth

CNS Canada –– Officials in North Dakota continue to hunt down suspicious plants in a bid to keep the aggressive weed Palmer amaranth from establishing there. Palmer amaranth, a pigweed species, made its first confirmed appearance in North Dakota last month, in a soybean field in McIntosh County, in the south-central area of the state.

Palmer amaranth can grow to be six to eight feet tall and produce a million seeds 
a year.  

On the lookout for Public Enemy No. 1

North Dakota asks farmers to watch for Palmer amaranth in their fields

North Dakota State University is asking farmers to be on the lookout for Palmer amaranth. The No. 1 weed problem in the U.S., hasn’t been spotted in North Dakota yet, but it has been identified in neighbouring Minnesota and South Dakota as well as in Iowa. In a release, NDSU extension agronomist Tom Peters said


Editorial: In the weeds

Canada has a brewing weed problem, and we’re not talking about the looming legalization of cannabis. This is an older problem, but with a modern twist, in the form of constant selection pressure from chemical control products and the resulting herbicide-resistant weeds. Manitoba farmers have the dubious distinction of being among the first in the

Herbicide-resistant Palmer amaranth can devastate crop yields.

Palmer amaranth resistance more complex

Two new mechanisms for herbicide resistance 
have been found in Palmer amaranth

Scientists are continuing to discover just what a difficult foe the weed Palmer amaranth can be. It can cause yield losses as high as 80 per cent for soybean growers and has already developed resistance to six classes of herbicide since its discovery in North America 100 years ago. It’s recently been found in North




Palmer amaranth. (United Soybean Board photo)

Minnesota probes Palmer amaranth’s sudden appearance

Chicago | Reuters — Minnesota has launched an investigation to find the source of seed mixes contaminated with weed seeds after the aggressive, herbicide-resistant Palmer amaranth weed was found on 30 areas planted in a federal conservation program. The weed grows very fast, reaching up to eight feet in height and can hold back commercial