Horseweed the focus of new Extension publication

December 1st, 2016

-E. Hill

Horseweed/marestail has been the #1 weed submitted to MSU Diagnostic Services for herbicide-resistance screening. In 2015, all samples screened were found to be resistant to glyphosate. In 2016, screens have only been completed for 6 of the 36 samples submitted, but all thus far were resistant to both glyphosate and the ALS inhibiting herbicides (e.g. FirstRate, Group 2). With wind dispersal making this problematic weed more and more widespread with each passing year it is important to be diligent about control. Just this past month Christy Sprague has published a new MSU Weed Science bulletin addressing this issue titled, “Herbicide-resistant horseweed (marestail) in Michigan: Keys to management in no-till soybean.” Check out the bulletin to see her latest recommendations.


2016 MSU Weed Tour = June 29th!

May 23rd, 2016

E. Hill

Mark your calendars for the upcoming MSU Weed Tour. Details about the tour can be found the newsletter “2016 MSU Weed Tour” by Drs. Christy Sprague and Bernie Zandstra. We’re expecting a great turn out as usual to see the latest and greatest in weed science research and recommendations from the Departments of Plant, Soil and Microbial Sciences and Horticulture.



New Extension Publication: “Tips for collecting weed seeds: Ensure your resistance sample gets tested”

March 29th, 2016

-E. Hill

In an effort to increase the quality of weed seed samples sent to MSU Diagnostic Services for herbicide resistance screening we have developed this brief, all-color publication”Tips for collecting weed seeds“. The most frequent weeds submitted include: horseweed/marestail, pigweeds/amaranths (Powell, Palmer, Redroot, Waterhemp), common ragweed, and common lambsquarters. Following the tips in this guide will give us the best chance of getting seedlings to germinate for the greenhouse bioassay.

Stay tuned for the results of this year’s herbicide resistance screening (with 47 samples submitted)!


NCWSS and WSSA presentations added!

February 17th, 2016

-E. Hill

If you missed out on the latest MSU Weed Science research presented at the North Central Weed Science Society (Indianapolis, IN) or Weed Science Society of America (San Juan, PR) annual meetings they are now available on in the Presented Research section! Poster pdf files and the oral paper abstracts are all available.


2016 Weed Control for Field Crops now online!

February 1st, 2016

-E. Hill2016WG_Cover

In addition to the new 2016 Weed Control Guide for Field Crops (E-434) being available for purchase at the MSU Extension Bookstore, you can now also view it as a PDF on!