Category: Agronomy Updates

Soybeans are flowering and pod filling and we have had some reports of fields with increasing populations of soybean aphids although still under economic threshold levels. This means we need to keep scouting since our crop is most at risk while it’s building our yield. Soybeans are most vulnerable to yield loss during the R1…

When we published this information four weeks ago, we hadn’t heard of any grasshopper defoliation concerns. We were just being proactive. But now we are getting reports of a few fields that had high enough defoliation levels due to grasshopper feeding to warrant control measures. Being that our crops are pod filling, this is when…

We’re entering that time of year when soybean stem diseases become more noticeable which is also, not surprisingly, when they are having the greatest impact on yield. Let’s take a quick look at the diseases we are most concerned about right now in southern Manitoba. White Mold (Sclerotinia) White mould can cause two to five…

We haven’t received any reports of two-spotted spider mites thus far. And, the weather hasn’t been very hospitable towards them. But, we have seen some soybean fields showing early signs of drought stress these last two weeks and that always puts us on guard. One of the problems with two-spotted spider mites is that they…

All graphics are from Keep It Clean. Peas may not be accepted if treated with pre‑harvest glyphosate. Check with your grain buyer before applying.  The real risk is applying late-season herbicide too early. Applying too early leaves high residue concentrations in the seed and can cause yield and quality loss. At the late end of…

Hail Damage in Soybeans “If hail is going to happen in soybeans, then it is better if it comes early rather than later in the growing season.” A large storm on July 5, 2026 with golf ball-sized hail, did major crop damage near Wawanesa. On July 9, this soybean field (looking west) appeared to have…

Soybeans field have started flowering which means it’s time to be on guard for the arrival of soybean aphids, our most predominant insect pest in this crop. Soybeans are most vulnerable to yield loss during the R1 to R5 growth stage. Will this year be a problem or will we have smooth sailing? Only well…

Scouting Tips Watch the Scouting Video!! Note: The agronomist in the video should have also opened the clam leaf to check for pea aphids. Threshold and Control The economic threshold for control is two to three aphids/plant tip or 90 to 120 aphids per 10 sweeps (or nine to 12 aphids per single sweep). If…

There are a lot of good reasons to assess nodulation in your soybean and field pea crops. Most importantly, we recommend conducting nodulation assessments in fields with no previous history of these crops. But it’s also important to do assessments in fields where soybeans or field peas have been part of the previous crop rotations,…