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Controlling Marestail Postemergence in Corn
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-18/controlling-marestail-postemergence-corn
We have received more questions about postemergence marestail control in corn this year than the past 10 years combined. We do not currently show effectiveness ratings on marestail for postemergence corn herbicides in the “Weed Control Guide for Ohio and ...
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Ohio Noxious Weed Law
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-18/ohio-noxious-weed-law
The potential for Ohio to become infested with Palmer amaranth has led to some interesting discussions about our noxious weed law in recent meetings where I have been a presenter. With regard to new weed problems such as Palmer amaranth, the gist of the ...
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Yellow Corn-What is Going On?
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-18/yellow-corn-what-going
Recent cloudy, cool, rainy weather has slowed growth of corn. Corn seedlings often turn yellow due to low nitrogen uptake and/or limited chlorophyll synthesis under cool, wet conditions. The visual appearance may be interpreted as N deficiency, but often ...
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Principles of Pokeweed Management
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-17/principles-pokeweed-management
Penn State recently completed a two-year study on pokeweed management in corn and soybeans that provides some useful information. Some of the highlights:- pokeweed is a perennial that regrows from a large taproot, and individuals may live a year or two, ...
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Asiatic Garden Beetles Continue to be an Issue in NW Ohio
Grubs of the Asiatic Garden Beetle (Maladera castanea) have been making their presence known in Northwest Ohio corn fields since 2012. For a long time this grub has been a pest in the lawn and turf industry, but in past few years it has severely damaged ...
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“Rootless” and “Floppy Corn” Make an Appearance
Last week I received several reports of “rootless” and “floppy corn” in Paulding County (Figure 1). Rootless corn (or rootless corn syndrome) occurs when there is limited or no nodal root development. Plants exhibiting rootless corn symptoms are often lea ...
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When to Spray Soybeans Field Day
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-17/when-spray-soybeans-field-day
Assessing soybean diseases and insect pressure can be difficult without proper training and experience. On July 8, 2014 farmers and crop consultants are invited to attend a 2 hour in-field session with Drs. Anne Dorrance and Andy Michel. Anne Dorrance is ...
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Weather Outlook for the First Half of June
https://agcrops.osu.edu/newsletter/corn-newsletter/2014-16/weather-outlook-first-half-june
It appears a cool low pressure will anchor over southeast Canada in June while a dome of very warm air will anchor over the southern U.S. This will leave the corn and soybean Midwest into the Ohio Valley in the target zone which will bring a more active p ...
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Cressleaf Groundsel- The Ubiquitous Yellow Weed
Cressleaf groundsel has been abundant throughout parts of Ohio for a while, but every year a few additional hay producers get to experience it for the first time apparently. We have some resources available online about the biology and control of this we ...
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Predicting Leaf Development in Corn Using Accumulated Heat Units
When estimating yield losses in corn due to hail, frost, and other types of plant injury, it’s essential to establish the stage of plant growth at the time damage occurred. It’s also important to know corn stage of development in order to apply post-emerg ...