Ontario Agriculture

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I guess nightshade doesn't get frost bite

The sight of nightshade's purplish/black berries in a "food grade" soybean crop is every producer's worst nightmare. They stain the seed and dramatically reduce the value of the crop. In theory, you would kill uncontrolled nightshade prior to harvest with either a herbicide (i.e. Reglone, glyphosate) or mother nature (i.e. a frost), the berries would drop to the ground, never go through the combine and the seed would be left unstained. Unfortunately this is a theory, and reality shows us otherwise. Around the 12th of October, a significant frost was observed in Waterloo/Wellington county which resullted in a number of annual weed species "dying off" in soybeans.

The one notable exception was nightshade. Even though the leaves were finally starting to wilt after 4-5 days of consecutive frosty mornings, the berries were still very much attached to the plant. Plant dessication with herbicides has proven equally ineffective as many berries will still cling to the plant even after it has died off. The average plant in this field had 280 berries with each berry averaging 60 seeds for a total of 16,800 seeds per plant.

If you had Eastern Black Nightshade in a field of "food grade" soybeans it's either because: 1) You didn't know it was there in the first place or 2) You knew it was there, but the herbicide was ineffective Public trials conducted by the University of Guelph (Sikkema, Swanton and Tardif) have shown that following herbicide programs provide greater than 80% control of Eastern Black Nightshade in soybean. 1) Pursuit (PRE or POST - 99% visual control) 2) Lorox L (PRE - 99% visual control at the highest labeled rate) 3) Dual II Magnum (PRE) followed by Reflex (POST - 98% visual control) 4) Dual II Magnum (PRE, highest labeled rate - 87% visual control) 5) Frontier (PRE, highest labeled rate - 80% visual control) If you have used one of the above herbicide treatments and they did not provide adequate control, it may be possible that the population of Eastern Black Nightshade in your field is resistant. The University of Guelph can test this population for you to determine if it is herbicide resistant.

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Comment by Wayne Black on November 8, 2009 at 3:05pm
Nightshade in some corn samples today at the elevator. My dad's field had it bad in a spot where the corn was thin and short. I think this weed needs an attitude adjustment next year!
Comment by Mike Cowbrough on October 20, 2009 at 9:30am
Thanks Joe, you're absolutely right. There has been limited experience in Ontario with Valtera on nightshade, but so far it has done a very nice job.
Comment by Joe Dales on October 20, 2009 at 9:20am
Hi Mike: The Valent company has a new product registered for nightshade as well.
Here is their news release on registration.


Valent Canada adds Valtera™ Herbicide to 2009 product lineup
Brand new active ingredient benefits soybean growers

GUELPH, ON —Valent Canada has received Health Canada’s Pest Management Regulatory Agency approval to register Valtera Herbicide for use in soybeans. Valtera is a low use rate preemergence herbicide which gives growers residual control of many broadleaf weeds and enhanced post emergence weed control when tank mixed with glyphosate. It has been sold in the U.S. since 2001 under the trade name Valor® Herbicide.

Valtera controls annual nightshade species (Eastern black nightshade and hairy nightshade), pigweeds (redroot and green), common ragweed, common lambsquarters, and dandelion. Valtera also provides suppression of green foxtail.

New active ingredient
Valtera contains the active ingredient flumioxazin, a member of the protox inhibitor type of herbicides (Group 14), and offers new management options for weeds resistant to Group 2 & 5 herbicides. However, unlike many other Group 14 herbicides, flumioxazin provides enhanced burndown and residual control.

Flumioxazin works by inhibiting production of an enzyme important in the synthesis of chlorophyll. "Its rapid soil and water dissipation," said Regina Rieckenberg, Valent Canada sales and marketing manager, "along with a low use rate, results in a low carryover potential to rotational crops."

In identity preserved soybeans, Valtera is intended to be used in a program with other residual herbicides. It should be applied as a preplant or early preemergence herbicide, from 30 days prior to planting and up to three days after planting (before emergence). In burndown situations, it can be used as a foundation herbicide partner with glyphosate in glyphosate-tolerant soybeans.

"By using flumioxazin in a program with other herbicides," said Rieckenberg, "the grower helps to preserve the effectiveness of other herbicides and decreases or delays development of weed resistance. With excellent weed control and flexible rotational restrictions, Valtera ushers in a new era of weed control."

Valtera is one of the many quality products from Valent Canada, including plant growth regulators, herbicides and insecticides. Valent's product line includes leading brands such as DiPel® Insecticide, Distance® Insect Growth Regulator (IGR), Fascination® Plant Growth Regulator (PGR), Foray® Biological Insecticide, MaxCel® PGR, Promalin® PGR. ReTain® PGR, Sumagic® PGR, VectoBac® Biological Insecticide and Velocity® Herbicide.

Agriculture Headlines from Farms.com Canada East News - click on title for full story

Soybean Fungicide Decisions

As soybean crops move into flowering, questions are sure to be raised about whether fungicide applications are needed. In anticipation, let’s take a closer look at the potential disease threats and what Manitoba On-Farm Network research has told us. What Should We Be Concerned About? Foliar diseases infecting soybeans in Manitoba typically occur at low severity levels and are not expected to impact yield most years. These usually include bacterial blight, downy mildew and Septoria brown spot. Stem diseases generally have a greater impact on yield. White mould: infections begin at nodes along the main stem. Wilted plants may be spotted from afar, within a humid canopy may find white mycelial growth and black sclerotia bodies later in the season. This disease is the main target of fungicide applications. Cool, wet conditions throughout July and August favour white mould. For every 10% increase in the percent of plants infected with white mould, 2-5 bu/ac of yield are lost in soybeans.

Fungicide Decision Tool for Managing Mycosphaerella Blight in Field Peas

When your peas have reached V10 (10th node stage), it is an ideal time to start scouting each field to evaluate if a fungicide application to manage Mycosphaerella blight is warranted. Continue scouting for symptoms from V10 (10th true node) to R2 (beginning bloom), during mid-June to late July. Mycosphaerella (Ascochyta) blight is the most widespread and economically damaging foliar disease of Manitoba field peas. Peas are the single host crop of Mycosphaerella but it can be managed by foliar fungicide. This pathogen can be stubble-, air-, soil- and seed-borne. Spores can travel long distances by air, meaning there is a disease risk even in fields where peas have not been grown previously. The impact of disease severity on yield will depend on how early the disease sets in and how quickly it progresses into the upper crop canopy. Early infections during the bloom to early/mid-pod stages cause the most damage if left untreated. Use this fungicide decision worksheet when scouting to

Manitoba pork, canola producers hold steady amid heavy tariffs

A slab of back bacon from Natural Raised Pork comes with a waitlist. Ian Smith points to tariffs. Since the United States placed levies on imports from Canada, Manitobans have increasingly been calling Smith about his farm near Argyle, some 40 kilometres northwest of Winnipeg. “There’s more people wanting to support local and I’m one of few people that do what I’m doing,” said Smith, 62. He estimates 90 per cent of his pork products are bought by Manitoba households; the latter goes to a packing plant. Last year, it was a 50-50 split. Smith works alone, hustling to meet the four-to-six week waitlist that’s accumulated. He keeps hundreds of feeder pigs and a couple dozen sows; it’s a relatively small operation, he noted. “If there’s any mistakes to be made, there’s only one person to blame and that’s me,” he said with a laugh. Smith doesn’t export to China — so he’s shielded from that nation’s levies still hanging over the Canadian industry.

KAP Welcomes Appointment of New U.S. Trade Representative

Keystone Agricultural Producers (KAP) welcomes the appointment of Richard Madan as Manitoba’s new trade representative to the United States. “We commend Premier Kinew and Minister Moses for making Manitoba’s voice a priority in Washington, D.C.,” said KAP President Jill Verwey. “We look forward to working with Mr. Madan to advance the interests of Manitoba farmers and the agricultural industry, ensuring these interests are at the forefront of his work as he forges stronger relationships with American policymakers and trade officials.” Agriculture is an important part of Manitoba’s economy, with $4.29 billion in agri-food exports to the U.S. alone in 2024, and KAP sees the new presence in Washington as instrumental in fostering strategic relationships with key states that are important to our trade interests. “The U.S. is Manitoba’s largest agri-food export destination and is one of Manitoba’s key trading partners on the international stage,” added KAP General Manager Colin Hornby. “

2025 Annual General Meeting

On Wednesday, June 18th, the Ontario Farmland Trust hosted its Annual General Meeting. The meeting was held hybrid again this year, with members and friends joining both virtually and in person.

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