Archive for the ‘Herbicide Resistance’ Category

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

Tuesday, 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)!


2015 Integrated Crop and Pest Management Update scheduled

Tuesday, October 20th, 2015

E. Hill

Mark your calendars for Tuesday, December 15th to attend the 2015 Integrated Crop and Pest Management Update at the MSU Pavillion. More details and online registration can be found in Michigan State University Extension link below.

2015 Integrated Crop and Pest Management Update

MSPC Sponsored Herbicide Resistance Video

Monday, October 5th, 2015

-E. Hill

MSPC video

Detection and Confirmation of Herbicide Resistant Weeds in Michigan

Collect weed seeds now if resistance is suspected

Friday, October 2nd, 2015

-E. Hill

If you suspect that you have herbicide resistant weeds in your fields, now is the time to collect seed and have it tested. This week I began my new role as the Weed/Herbicide Diagnostician with MSU Diagnostic Services. One of my main responsibilities is continuing the herbicide resistance screening that has been conducted in Christy Sprague’s laboratory the past several years. The Michigan Soybean Promotion Committee has agreed to continue to suplement the costs of this testing for soybean growers so that they may submit samples free of charge. Species that are eligible for the free testing include amaranth species (Palmer amaranth, common waterhemp, Powell amaranth), maretail/horseweed, common and giant ragweed, and common lambsquarters. A minimum of 5 plants with mature seed present should be collected, stored in a sealed paper bag and mailed or brought into Diagnostic Services (578 Wilson Rd., Room. 107, East Lansing, MI 48824-6469). Please also send in a completed form with your submission (MSPC resistance screen form).

The turn around time for results can  be 2-3 months to allow us to clean samples, break seed dormancy, grow and treat seedlings in the greenhouse, and assess control.

Stay tuned as I develop some photos and other materials to ensure the best collection of samples.


Recently this topic has been in the MI news:

Consider collecting seeds from weed escapes if you think they may be resistant to herbicides  -MSUE, Bruce MacKellar

Also,  stay tuned for a video that Christy Sprague and I recorded with MSPC this week further detailing detecting and confirming resistance.



Registration now open for the 2015 MSU Weed Tour- July 1st

Monday, May 18th, 2015

-E. Hill

Registration is now open for the 2015 MSU Weeds Tour.

Details regarding the tour can be found at: 2015 MSU Weeds Tour

Or go directly to the registration page at: MSU Events Management System

*We are now using the MSU Events Management System, which allows us a secure method to take credit card payments online and should help speed up check-in the day of the event.

Heading out to the 2014 research and demonstration plots.

Heading out to the 2014 research and demonstration plots.

We hope to see you at the Tour!