GFM Network News


The white cysts on the plant roots begin the cycle, and are the only part of that cycle visible to the naked eye.

Soybean cyst nematode: Managing the ‘silent yield robber’

This soybean pest can be impossible to spot but can take a big bite

Soybean cyst nematode (SCN) is a new-to-Manitoba soybean issue that’s the No. 1 soybean pest in North America, and one a U.S. specialist calls the silent yield robber. Soybean cyst nematode (SCN) is a microscopic roundworm that attacks the roots of soybean and is the No. 1 soybean pest in North America. John Wilson, extension

Almost all the existing soybean varieties on the market share a resistance gene.

Look past genetics for soybean cyst nematode management

Resistance is just part of the control equation

Soybean growers have variety options when it comes to soybean cyst nematode (SCN), but pulse specialists say those varieties largely rely on the same type of resistance, one that has already come under fire in the U.S. The University of Manitoba, led by Mario Tenuta, has been on the watch for SCN in Manitoba since 2012, but this


Soybean cyst nematode has been confirmed in Manitoba for the first time.

Soybean cyst nematode confirmation presents challenge for producers

Pests like soybean cyst nematode and clubroot are present and rising in Manitoba fields, but the steps to prevent both of those pests are largely the same

Farmers are being urged to keep equipment clean after the confirmation of yet another soil-borne crop threat in the province. Farmers got the unfortunate, but not unexpected, news that soybean cyst nematode (SCN) infections have been confirmed in four municipalities Sept. 16. The nematode, which can spread through water, has been present in North Dakota

Soybean cyst nematode confirmed in Manitoba

A damaging soybean pest that was expected to show up sooner or later in agricultural Manitoba has officially arrived. Crop surveys by University of Manitoba Ph.D. student Nazanin Ghavami with soil science professor Mario Tenuta and his students have turned up soybean cyst nematode at “extremely low” levels on soybean plant roots in one field

Soybean plant with nematode filled cysts.

Soybean Cyst Nematode confirmed in four Manitoba RMs

The populations remain low and manageable, but it will be a challenge

A study at the University of Manitoba has confirmed the presence of soybean cyst nematode in the province. Soil scientist Mario Tenuta, of the University of Manitoba, have confirmed it visually and through molecular DNA methods in four fields, out of a total of 106 fields tested, in a study running from 2012-2019. At this


Cysts (the large white growths) on the roots of a soybean plant.

Manitoba poised to meet advancing soybean cyst nematode

The pest’s arrival is imminent if it hasn’t happened already

A microscopic parasitic roundworm that’s the top soybean yield robber in the U.S. is already present on the Manitoba-North Dakota border and the province is readying for its imminent arrival. Soybean cyst nematode (SCN) is often cited for causing approximately US$1 billion in U.S. soy production losses every year, and it’s that kind of devastation

White to light-yellow soybean cyst nematode females on soybean roots.

Soybean cyst nematode likely already in Manitoba

A recent survey reveals soybean cyst nematode is in border counties such 
as Cavalier, Towner, Rollette and Renville

Crop advisers in North Dakota are keeping a watchful eye on the northward advance of soybean cyst nematode (SCN) — and so should Manitoba growers, said a cropping systems specialist. SCN, a round worm that parasitizes roots of soybean and can reduce yields anywhere from 15 to 30 per cent before ground symptoms are present,

First soy seed treatment cleared against SDS

A Bayer CropScience fungicide is being pressed into service against sudden death syndrome (SDS) in Canadian soybeans. Bayer on Monday launched a new soybean seed treatment dubbed ILeVO, a suspension containing its Group 7 fungicide fluopyram at a rate of 600 grams per litre. ILeVO will be the first soybean seed treatment registered for use


Mario Tenuta holds up a jar containing soybean roots with nematodes for inspection at the Ian N. Morrison research farm near Carman.

Soybean cyst nematode co-evolved with crop

They are tiny world travellers and Manitoba’s Red River Valley could be 
the next stop on the soybean cyst nematode’s global tour

In the middle of the Ian N. Morrison research farm near Carman, an unlikely scene is unfolding as farmers and agronomists crowd around what looks like an old jam jar. “Careful, we don’t want this to break,” Mario Tenuta stresses, with a bit of a chuckle. But what’s inside the tightly sealed jar is no

 Soybean plant with nematode-filled cysts.

On the lookout for soybean cyst nematodes

But make no mistake, this new destructive pest is coming and farmers 
can learn more about it July 22 at the SMART Soybean Day in Carman


Soybean cyst nematodes haven’t been found in Manitoba yet. That’s the good news. The bad news is it’s only a matter of time until they are, says University of Manitoba soil scientist Mario Tenuta. But early detection will help farmers manage it. The search for the small, soil-borne, worm-like parasites that can dramatically reduce soybean