Proper staging is critical when applying in-crop herbicides in corn, but there are multiple ways to measure corn’s growth stages, and herbicide labels don’t always use the same method. Agronomists often use the “leaf collar” — or V-stage — method to describe growth stages, while others use plant height. However, herbicide labels often refer to… Read More

Dry spring planting conditions have many growers wondering how their soil-applied residual herbicides will perform, as the weather continues to heat up with little meaningful rain in sight. Research by University of Guelph weed scientist Dr. Peter Sikkema indicates pre-emergence herbicides will still deliver significant value for growers in dry spring conditions. He notes that… Read More

Plenty of things are showing signs of life right about now in Ontario, including the weeds. To determine how to control these yield-robbing plants in the weeks ahead, Bernard Tobin is joined by Rob Miller, agronomist at BASF, in this episode of the Corn School. Typically, a conversation on spring weed control is determined by what… Read More

Resistance to Bt corn rootworm hybrids has developed in Ontario and growers are asking: what’s the best strategy to control the yield-robbing pest if in-seed technology fails? Resistance has been confirmed in several fields in Huron, Perth and Durham Counties in Ontario and the problem is likely even more widespread, says Tracey Baute, Ontario Ministry… Read More

Selecting the right hybrids can make or break the profitability of a corn crop. There are a multitude of factors that combine to produce high-yielding, profitable harvests, but if growers make the wrong hybrid choices they’ll need some luck and good fortune to produce a successful crop, says University of Guelph associate professor Dr. David… Read More

Tar spot has moved through the U.S. Midwest, into Michigan and Wisconsin, and now officially calls Ontario home. Ontario Ministry of Agriculture, Food and Rural Affairs’ plant pathologist Albert Tenuta has seen the evidence in a field near Ridgetown, Ont., and there are also reported sightings of the corn leaf disease in Lambton and Essex… Read More