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Spraying Roundup on Harvextra Alfalfa gives disease control

This herbicide can help to “manage foliar diseases in glyphosate-tolerant alfalfa

By Patrick Lynch
Farms.com

Greenhouse research by USDA and University of Minnesota researchers has shown that spraying glyphosate on Roundup Ready alfalfa reduces the amount of rust on alfalfa plants. When four-week old plants were sprayed with glyphosate and then inoculated with rust, the rust did not spread. 

Treatment increased protection from anthracnose and reduced symptom severity for spring black stem and leaf spot. The research report concluded that “these results indicate that glyphosate could be used to help manage foliar diseases in glyphosate-tolerant alfalfa.”


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Dr. Emerson Nafziger: Nitrogen Fertilizer Rates for Corn

Video: Dr. Emerson Nafziger: Nitrogen Fertilizer Rates for Corn

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!

"The nitrogen that comes from soil mineralization is the first nitrogen the plant sees, and its role is underestimated."

Meet the guest:

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.