New Palmer amaranth finds – we’re mowing down soybean fields folks
It’s been a “fun” couple weeks to be a weed scientist. While on vacation we were getting calls about new Palmer amaranth finds and had to make the recommendation to mow down one field of soybeans in SW Ohio to…
Marestail control in wheat stubble – applicable OSU research
As promised in the C.O.R.N. newsletter, we have added a link on the marestail page (or click here) to access some of our research results on control in wheat stubble and a couple other tough situations. The first page shows…
A few observations from windshield scouting
We spent some time windshield scouting fields northeast of Columbus this week after being called out to determine whether a mystery weed was Palmer amaranth. There were only a few plants of this mystery weed in the field, and it…
U of Missouri Weed Identification and Herbicide Injury Guide
The weed science group at U of Missouri has released a new publication, “Weed Identification and Herbicide Injury Guide”. It’s available for $18 at http://extension.missouri.edu – search for “IPM1007”. It’s well done, so consider adding to your library or folder…
Can you burn down big marestail this late?
There are still some tough burndown situations in the state due to weeks of less than ideal weather conditions. Controlling large marestail is probably the biggest challenge, especially when there’s not much time between herbicide application and soybean planting. This…
It’s official – marestail is public enemy #1 in soybeans
Results of a national survey of weed scientists and practitioners conducted by the national and regional weed science societies are in. Probably no surprise to all of us here in Ohio that marestail was identified as the most troublesome weed…
Get a handle on pigweed identification
Our latest video covers pigweed identification. We compare four aspects of pigweed biology that we use to differentiate between redroot pigweed, waterhemp, and Palmer amaranth – pubescence, petiole length, leaf shape, and inflorescence (seedhead) characteristics.
Celebrating the amazing dandelion
Yes I know – it’s not officially spring yet. Here are some poems about the resilient and adaptable dandelion anyway. The Dandelion’s pallid tube – Emily Dickinson The Dandelion’s pallid tube Astonishes the Grass, And Winter instantly becomes An infinite…
Palmer amaranth status in Ohio
As of late 2015, Palmer amaranth had been found in at least 11 counties in Ohio. A “find” can consist of a few plant or a few fields depending upon the county. Populations are increasing in some counties, but in…
