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…
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…
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…
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…
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.
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…
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…
Our digital books on weed identification are now available for use on all types of devices via iTunes and GooglePlay. These include “The Ohio State University Guide to Weed Identification“, “Identifying Noxious Weeds of Ohio“, and “Principles of Weed Ecology…
Each fall we provide an article and video on new herbicides to the OSU Pesticide Applicator Training group, for use in recertification by our educators. The article ends up in the annual recertification proceedings book, and can also be accessed…
