Event Notice – Managing Prevented Planting Acres

Join us in one of two locations for an informational meeting on how to manage prevented planting acres. Topics will include weed control, options for annual forages, how to manage treated soybean seed, and a Q&A session with listed speakers and representatives from the cover crop and crop insurance industries.

2019 Prevented Planting Meeting Flyer

Ponding and Saturated Soils: Results of Recent Ohio Corn Research

By: Alexander Lindsey and Peter Thomison, Ohio state University Extension

Persistent rains during May and early June have resulted in ponding and saturated soils in many Ohio corn fields and led to questions concerning what impact these conditions will have on corn performance.

The extent to which ponding injures corn is determined by several factors including (1) plant stage of development when ponding occurs, (2) duration of ponding and (3) air/soil temperatures. Continue reading

Average Fall Freeze Dates for Corn Considerations

By: Aaron Wilson, OSU Extension Climate Specialist and Sam Custer, OSU Extension Darke County

In last week’s C.O.R.N. newsletter, Peter Thomison provided useful information on tools available for switching corn hybrids (https://agcrops.osu.edu/newsletter/corn-newsletter/2019-15/more-switching-corn-hybrid-maturities). As Dr. Thomison points out, Dr. Bob Nielsen at Purdue University wrote an article describing the U2U Corn GDD Tool, available from the Midwest Regional Climate Center (https://mrcc.illinois.edu/U2U/gdd/), with caveats to keep in mind as one is making their decisions. Specifically, users are encouraged to modify their black layer GDDs within the tool in order to reflect a more accurate assessment of days to maturity.

Continue reading

2019 C.O.R.N. Articles Addressing Delayed Planting

By: Alan Geyer, Research Associate, OSU Horticulture and Crop Science

Below is a list of 2019 Ohio State University Extension C.O.R.N. newsletter articles addressing the topic of delayed planting.  This is a summary of articles published this season through the May 28 issue:

Corn Related Articles

Continue reading

How Late is Too Late for Corn?

By: Harold Watters, Ohio State University Extension CCA

As I write this it is obvious that the majority of the corn crop this year will be planted after May 20. I sat last Thursday with a grower from Miami County. We figured the days it takes him to dry out, then to plant first corn and then soybeans and determined that at least some of his crop will be planted into June no matter what. Yields are likely to be reduced. Continue reading

Yellow Fields Forever

By: Joe Boggs, OSU Extension
The dichotomous nature of cressleaf groundsel (a.k.a. butterweed) (Packera glabella; syn. Senecio glabellus) tests the tolerance of lovers of native wildflowers.  On one hand, a sea of golden-yellow flowers carpeting farm fields in Ohio provides welcome relief from highway monotony.  On the other hand, upright 2 – 3′ tall plants dominating Ohio landscapes presents a weed management challenge.

Cressleaf Groundsel

Cressleaf groundsel is so-named because its lower leaves resemble watercress.  Its alternate common name of butterweed comes from its conspicuous buttery yellow flowers. Continue reading

Managing Big, Wet Cover Crops

By: Mark Loux, OSU Extension Weeds Specialist

Managing cover crops in a year like this can challenge even those with the most experience. A few suggestions regarding termination of covers:

• Increase glyphosate rates to compensate for larger size, and consider applying alone or just with Sharpen. Mixing glyphosate with other herbicides or ATS can reduce its activity on grass covers, especially when large. Herbicides that can antagonize glyphosate include 2,4-D, metribuzin, atrazine, and flumioxazin and sulfentrazone products. Sharpen has not caused a reduction in glyphosate activity on grass covers in university research. One approach would be to apply the glyphosate or glyphosate/Sharpen first, wait a few days, and then apply residual herbicides. Continue reading

Recommendations for Late Planted Soybeans

By: Laura Lindsay, OSU Extension Soybean Specialist

Persistent wet weather is likely to push soybean planting into late May-early June in many areas of the state. Late planting reduces the cultural practice options for row spacing, seeding rate, and relative maturity.

Row spacing. The row spacing for June planting should be 7.5 to 15-inches, if possible. Row width should be narrow enough for the soybean canopy to completely cover the interrow space by the time the soybeans begin to flower. The later in the growing season soybeans are planted, the greater the yield increase due to narrow rows. Continue reading

Will Planting Delays Require Switching Corn Hybrid Maturities?

By: Peter Thomison, OSU Extension Corn Specialist

According to the USDA/NASS, for the week ending May 5, only 2% of Ohio’s projected corn acreage was planted – compared to 20% last year and 27% for the five-year average. Persistent rains and saturated soil conditions have delayed corn planting. The weather forecast this week indicates the likelihood of more rain so it is probable that many soggy fields may not be drying out soon.

Given this outlook, is there a need to switch from full season to shorter season hybrids? Probably not. In most situations, full season hybrids will perform satisfactorily (i.e. will achieve physiological maturity or “black layer” before a killing frost) even when planted as late as May 25, if not later, in some regions of the state. Continue reading