Weed Specialist Says Perennials And Winter Annuals Getting Head Start

Apr 23, 2019

The reduced risk of flooding this spring is helping to keep unwanted weeds at bay.

"We were very concerned that with flood waters coming from the south, that there would be some other species that might get introduced into our cropping system," said Manitoba Agriculture Weed Specialist Tammy Jones. "That we might see more waterhemp and possibly even Palmer amaranth flowing up and thankfully, that didn't happen."

She explained what effect the dry conditions are having on Manitoba fields.

"It means that our perennials and our winter annuals are getting a head start."

Jones notes the warm temperatures over the past few days have led to the emergence of many types of weeds.

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Video: Wisconsin Corn and Soybean Weed Management Updates and Considerations for 2026 and Beyond

Dr. Rodrigo Werle, associate professor and extension weed scientist, UW–Madison, shares the latest updates and future considerations for corn and soybean weed management in Wisconsin. This presentation covers herbicide resistance trends in waterhemp, including newly confirmed cases of HPPD and S-metolachlor resistance, and emphasizes the importance of residual herbicides and strategic tank mixes for consistent control. Rodrigo also introduces upcoming technologies like Vyconic soybeans and new herbicide products, discusses integrated weed management strategies such as planting green with cover crops, and highlights practical recommendations for 2026 and beyond.

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