Recent symptoms in some Ontario soybean fields have raised concerns about a new virus that may be in Ontario. Soybean Vein Necrosis Virus (SVNV) is a relatively new disease to northern US soybean growing areas. SVNV is common in the southern US soybean growing areas. Symptoms typically start around the midvein of the soybean leaf…
We have reached the stage in soybean development when nodules are forming. Every year I customers that are concerned that their soybeans are yellowing. We received a nice rain in most areas and warm temperatures have boosted crop growth. In just a few days things have changed. Soybean plants have used up the native nitrogen…
When soybeans are planted, germination begins by the seed absorbing water from the soil until the moisture content is approximately 50%. The radicle is the first visible sign of germination and grows downward (primary root). Not long after the radicle emerges, the hypocotyl starts growing upwards pulling the cotyledons. After it emerges, the hook shaped…
In areas where rainfall amounted to 1 to 3 inches in a matter of minutes, there is a possibility of crusting. We need to be proactive in watching our crop. Seed is very resilient and vigourous this time of year, so it will remain healthy under the crust and will definitely push through if the…
1) Shake or roll pail before opening. Product must be fluffed up after settling during shipping. 2) When applying, spread and mix product into seed (don’t dump the scoop or pail in a pile). 3) More is not better! This product is wax based and too much product leads to clumping. Kirk Van Will, CCA-ON,…
It is very hard to estimate soybean yield accurately in a field. Soybeans have a great ability to compensate for various growing conditions. Pod number, seeds per pod and seed size all play a role in calculating soybean yield. Pod number: early to midseason stresses can limit how many pods are retained. Seeds per pod:…
Standard thresholds for soybean defoliation from bloom to pod fill is 15%. It increases to 25% during pod-fill to maturity (unless pod feeding is occurring). When scouting, be sure to look at leaves from the center of the canopy to get a representative sample. Most often, the feeding looks worse than it is and a…
While travelling over the last couple of weeks, I have been hearing a lot of talk about how nice and tall everyone’s soybeans are this year. Even in hard-hit areas with lots of moisture, most fields are rebounding. In loam soils, soybean plants are getting very tall and some are starting to lodge. The fear…
Soybean aphids have been found in a number of locations in Ontario this year. Aphids were first found in Ontario in 2001. Since then, soybean aphids have been found in varying numbers across the province. Management of this insect has also changed as the industry learns more about its behaviour. Aphid populations are being found…