Key Issues Perspective: Seed companies teaching weed control
As Hopkins noted, glyphosate was often applied when weeds were outside the recommended size, and those escaped weeds were part of the start of glyphosate weed resistance. With this in mind, Bayer CropScience wants to assure its seed and herbicide technology system is maintained as effective.
“Early timing is not only great for effective control of weeds, but also making sure that we don’t put Liberty herbicide under unnecessary selection pressure by targeting weeds that are too large,” he said.
Regennitter said, “I can remember when universities were first talking about chemical weed control as opposed to cultivation. They used the wording of economic threshold to talk about how many weeds could be left in a field. Today, the economic threshold is zero because you cannot have any weeds growing out there because they will eventually be resistant to the herbicides being sprayed. We’ve seen it happen.”
Hopkins added, “Removing all the weeds while they are young and small will prevent competition and prevent the potential for yield loss, too.
Hopkins is extremely confident that the LibertyLink and Liberty herbicide weed control system with a pre-emergence herbicide down first is the “most effective and important system for every soybean grower.”