Soil Residual Herbicides And Establishment Of Cover Crops In The Fall

Crimson clover stands in 2019 cover crop trials. (Photo Credit: Connor Hodgkiss)

By Marcelo Zimmer and Bill Johnson, Purdue Extension

Indiana growers have shown increased interest in utilizing cover crops in our corn and soybean production systems over the last decade.  Concurrently, there has also been increased utilization of soil residual herbicides to help manage herbicide-resistant weeds such as marestail (horseweed), waterhemp, and giant ragweed in our corn and soybean production systems.  Soil residual herbicides can remain active in the soil for a period of weeks to months after application.  The length of time a residual herbicide remains biologically active in the soil is influenced by soil texture, soil pH, organic matter, rainfall, and temperature.  Since these factors will vary from field to field, definitive time intervals of residual herbicide activity can be difficult to predict.

The use of residual herbicides in our corn and soybean production systems may interfere with the establishment of fall-seeded cover crops under certain conditions.  Unfortunately, many of the species being used for cover crops were not evaluated for herbicide carryover when field research was conducted to support EPA’s approved herbicide labels.  As a result, data are lacking regarding rotational intervals of many residual herbicides for the establishment of many cover crop species. Continue reading

ODA’s Clean Sweep Program Set for August 19 in Findlay

ODA has selected three sites across Ohio for their annual Clean Sweep collection of agricultural pesticides in August. These locations are:

August 18: Fayette County 9 am – 3 pm

Fayette County Airport
2770 Old Rt 38 NE.
Washington Courthouse, Ohio 43160

August 19: Hancock County 9 am – 3 pm

Hancock County Fairgrounds
1017 E. Sandusky Street
Findlay, Ohio 45840

August 25: Lake County 9 am – 3 pm

Perry Coal and Feed
4204 Main Street
Perry, Ohio 44081

Unused, unwanted, and unlabeled pesticides pose many health and safety risks to you and those on your farm. Luckily, farmers in Paulding County don’t have to travel too far to dispose of these pesticides and pesticide containers this year. Between now and August 19, I encourage everyone to collect pesticides and pesticide containers that may be in your sheds, shops, chemical cabinets, etc. that you no longer use or plan to use. The disposal is free and there is no cost to you. Continue reading

Website open for online Pesticide and Fertilizer Re-certification registration

The link for the Paulding County pesticide and fertilizer re-certification is active and live.  The new option for 2019 to pay by debit or credit card.  Registration is needed to be filled in online even if you are not paying by credit card.  I realize some applicators have stopped in the office and paid.  We will be sending the online link in an individual email for all those who pre-registered by calling our office.  Thanks for your patience during our learning year.  Continue reading