Current Newsletters
Temperature effects on burndown herbicide applications
The drastic swings in temperature over the last several weeks have growers questioning what effect temperature has on weed control from burndown herbicide applications. Several years ago we conducted trials...
April 12, 2012
Glyphosate-resistant and some glyphosate- and ALS-resistant horseweed found in Michigan fields: Early management is important
In 2010 two horseweed samples suspected of being resistant to glyphosate were collected from a no-till soybean field and a stale seed-bed sugarbeet field in Ionia and Gratiot counties were confirmed resistant to glyphosate. In 2011 six additional horseweed samples from Lapeer, Clinton, and Washtenaw counties were confirmed resistant to glyphosate and some of these samples are multiple resistant to glyphosate and ALS-inhibitors (FirstRate and Classic), which makes this weed extremely difficult to control in soybean.
April 12, 2012
Early rapid wheat growth may alter your weed management
Unseasonably warm temperatures experienced earlier this month have increased the growth Michigan’s winter wheat crop. Because of these temperatures we are seeing a wide range of wheat growth stages across Michigan. In fact, several wheat fields have reached or are approaching jointing (Feeke’s stage 6) which needs to be considered when choosing herbicides for weed control. Achieving good herbicide coverage may also be tougher because of early rapid wheat growth. While some of Michigan’s wheat crop has already been sprayed for weed control, here are some considerations for fields that have not yet been treated.
March 30, 2012
Nitrogen as a spray carrier can affect winter wheat
Over the last three years research has been conducted to answer the following questions:
- What effect will applying my herbicide with 28% UAN (nitrogen) as a spray carrier have on weed control and wheat tolerance?
- Can I reduce this risk by applkying my herbicide with a 50:50 mixture of 28% UAN and water as the spray carrier?
- Will the timing of these herbicide-nitrogen carrier applications influence crop tolerance?
April 6, 2011
Announcements
- Glyphosate-resistant Palmer Amaranth in MI, 2 updated extension publications on identification and management
- 2012 Weed Control Guide for Field Crops (E-434)
- 2011 Economics of Weed Control Programs for non-GMO soybeans
Upcoming Events
- June 27, 2012- 2012 MSU Weed Tour- Information and registeration now available online!
