Waterhemp’s rise to the Cornbelt’s worst weed is one of the Cornbelt’s more fascinating weed-related events over the past 40 years. Waterhemp is native to the United States but is a […]
Harvest Weed Seed Control – Waterhemp Seed Retention Oct 22, 2019
Combines are the most important seed dispersal mechanism for weeds in our cropping system. While a small amount of seed may leave the field with grain, most weed seed that enter […]
The spread of multiple-resistant weeds threatens Iowa’s production system. In order to slow the expansion of resistance, greater diversity in weed management is necessary.
Fall Burndown: 3 Points To Remember Oct 1, 2019
The plentiful rain in September has provided ideal conditions for establishment of winter annual weeds, thus many no-till fields will have dense stands of these weeds going into winter (Fig. […]
As harvest approaches, Iowa State University will conduct a statewide survey to collect waterhemp seeds produced by plants in corn/soybean fields as well in field edges.
One of the disappointing finds was the discovery of Palmer amaranth along the road in Mills County. “If we are going to stop or limit the movement of Palmer amaranth […]
Although it is too late to protect crop yields, a common question is whether herbicides can be used to reduce the quantity of viable weed seed produced by weeds.
Iowa: Weed Management – What Is a Realistic Goal? Aug 16, 2019
The current approach to weed management in Iowa is at risk due to rapid expansion of herbicide-resistant weeds. In order to preserve the efficacy of herbicides two things must happen.
Iowa: Palmer Pigweed – Time to Scout Aug 2, 2019
Now is a great time to scout for Palmer amaranth (Amaranthus palmeri) in Iowa crop fields. As of late 2018, this species had been identified in over half of Iowa’s […]
Corn planting has been start and stop, and generally delayed this spring. In some situations the decision was made to plant and not apply nitrogen, or planting progressed so quickly […]