Weeds

C.O.R.N. Newsletter Articles

It’s All About the Weed Seedbank – Part 1: Where Has All the Marestail Gone?

Author(s): Mark Loux

For the second year in a row, we are scrounging to find enough marestail at the OARDC Western Ag Station to conduct the research we had planned on this weed. After years of having plenty of marestail, we have had to look around for off-site fields where there is still a high enough population. Which, since we are scientists after all, or at least make our best attempts, left us thinking about reasons for the lack of marestail, and our overall maresta

Issue: 2019-10
What’s Legal to Apply to the LL-GT27 Soybean – The (maybe almost) Final Story

Author(s): Mark Loux

Having to issue a retraction to previous C.O.R.N.

Issue: 2019-05
Cover Crop Survey - Quick and Painless

Author(s): Mark Loux

OSU weed scientists are in the process of planning cover crop research, and could use your input. Cover crop use has been on the rise in recent years, most commonly for the preservation of soil, reduction in nutrient loss, and suppression of weeds they can provide. Feedback from this survey will allow us to perform trials that are in line with practices common in the state of Ohio and thus generate more impactful results. Thank you!

Please take our five second survey!

Issue: 2018-23
No Pigweed Left Behind - Late-Season Scouting for Palmer Amaranth and Waterhemp

Author(s): Mark Loux

If you don’t already have to deal with waterhemp or Palmer amaranth, you don’t want it. Ask anyone who does. Neither one of these weeds is easy to manage, and both can cause substantial increases in the cost of herbicide programs, which have to be constantly changed to account for the multiple resistance that will develop over time (not “can”, “will”). The trend across the country is for them to develop resistance to any new herbicide sites of action that are used in POST treatments. Preventing new infestations of these weeds should be of high priority for Ohio growers. When not adequa

Issue: 2018-23
Reminders about dicamba

Author(s): Mark Loux

This is the time of year when we received our first call about dicamba problems in soybeans in 2017. We can probably expect any problems to become evident soon, based on the timing of postemergence applications and timeline for development of symptoms. Off-target issues have already developed in states farther west and south, and we would expect at least some to occur here, unless we’re really lucky.

Issue: 2018-19

Publications

Ohio, Indiana and Illinois Weed Control Guide, Bulletin 789

12/2016

Ohio, Indiana and Illinois Weed Control Guide, Bulletin 789. Publication gives detailed guidance on weed control selections. Numerous tables by crop and application help producers select the best product option for their weed control situation.