Weed Identification Series, Galinsoga (Quickweed)

Oct 27, 2017

By Mark Renz

Due to the warm weather last week we thought we would share one more weed ID plant for the season: Quickweed aka Galinsoga. We actually have two species of this plant in Wisconsin, but they both act very similar so we decided to lump them into one category. These species have been historically common in urban areas as well as horticultural fields but I have been getting more and more reports in agronomic fields over the past 3-4 years.

Quickweed is a summer annual that grows, flowers and produces seed very fast; hence the name. What makes this plant so unique is seed usually aren’t dormant so seed produced in one year can germinate in the same year. While most germination occurs through June, it can continue through the summer and in some year even into the fall. I actually saw quite a few seedlings last week from our previous warm weather.

Source: wisc.edu

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The Crop Science Podcast Show, Dr. Emerson Nafziger from the University of Illinois breaks down decades of nitrogen research. From the evolution of N rate guidelines to how soil health and hybrid genetics influence nitrogen use efficiency, this conversation unpacks the science behind smarter fertilization. Improving how we set nitrogen fertilizer rates for rainfed corn is a key focus. Discover why the MRTN model matters more than ever, and how shifting mindsets and better data can boost yields and environmental outcomes. Tune in now on all major platforms!

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Dr. Emerson Nafziger is Professor Emeritus of Crop Sciences at the University of Illinois at Urbana-Champaign, with degrees in agronomy from Ohio State, Purdue, and Illinois. His research has focused on nitrogen rate strategies and crop productivity. He co-developed the Maximum Return to Nitrogen (MRTN) model, which is widely used across the Midwest. His research spans N response trials, hybrid interactions, crop rotation effects, and yield stability.