Rushville Republican

Agriculture

November 16, 2012

Farmers need to watch for drought-induced herbicide carryover

RUSHVILLE — This summer’s lack of rain has translated into the potential for summer-applied herbicides to carry over into winter wheat or even spring-planted corn and soybean crops - something growers need to be monitoring, two Purdue Extension weed scientists say.

In a normal year, soil moisture helps dissipate herbicide soil concentrations, but in a drought year, the lack of moisture slows that process. Some herbicides might carry over and exceed the labeled crop rotation restrictions meant to prevent injury to the next crop.

“The largest concern this year is the carryover of atrazine and subsequent injury on wheat,” Bill Johnson said. “It is off-label to plant any crop other than corn or sorghum during the same calendar year of an atrazine application.”

Labels vary on exact rotational restrictions, but most atrazine premix labels range 14-15 months.

Another herbicide with potential to injure wheat is fomesafen applied postemergence in soybeans. The wheat rotational restriction for fomesafen is four months after application, but in areas that saw the least rainfall, Johnson said the carryover could be longer.

“Producers who applied a fomesafen product to soybeans this summer and have not seen significant rain following application should be aware of the potential for injury on emerging wheat,” he said.

The return of rain to some areas has reduced some of the concern for herbicide carryover into spring-planted crops, but it hasn’t eliminated it altogether.

According to Travis Legleiter, Purdue Extension weed scientist, producers in areas that haven’t had significant rain should still be aware of the potential for atrazine and HPPD inhibitors to carryover into soybeans - especially in high pH or high clay content soils.

He also suggested that producers be wary of potential imidazolinone chemistry carryover into spring-planted corn.

Growers concerned about herbicide carryover have two options for analyzing soil. The first is to conduct a bioassay, a method of planting susceptible crop seeds into suspected soil and comparing the growth and injury to plants grown in a non-herbicide treated soil. A bioassay can be done in the field or in containers.

The second option is to take soil samples from suspected carryover fields and have them analyzed by a commercial lab, which can be costly.

“Both bioassays and lab analysis should either be done in late fall or early spring to allow for maximum herbicide degradation and provide a more representative result of potential injury at planting,” Legleiter said.

More information about conducting bioassays and a list of commercial soil labs are available in the Oct. 12 edition of Purdue Extension’s Pest and Crop Newsletter at http://extension.entm.purdue.edu/pestcrop/2012/issue26/index.html#indiana

 

1
Text Only
Agriculture
  • Farmer ships Vidalia onions ahead of start date SAVANNAH, Ga. (AP) - A major grower of Georgia's famous Vidalia onions said Wednesday he had begun shipping his crop early to supermarkets in defiance of the state agriculture commissioner, who has warned that a new regulation prohibits farmers from

    April 18, 2014

  • Hurt: WASDE report eases fear of low crop prices WEST LAFAYETTE - The U.S. Department of Agriculture's April 9 World Agricultural Supply and Demand Estimates continued a series of recent reports that have offered corn and soybean producers a more optimistic grain-price outlook than what was expecte

    April 18, 2014

  • Seminar to discuss quality forages, quality meat for producers WEST LAFAYETTE - Forage and livestock producers who want to learn about the role forage quality plays in meat quality can attend the Indiana Forage Council seminar. This year's seminar, Quality Forage-Quality Meat, will be held in conjunction with th

    April 11, 2014

  • Purdue Agriculture and Extension events Here is a look at current and upcoming events for Purdue Agriculture and Extension. APRIL 9-16: HARDWOOD LUMBER WORKSHOP The Purdue University Department of Forestry and Natural Resources is offering a workshop for those interested in the hardwood in

    April 11, 2014

  • Ag economist: Baby pig losses greatest in winter months WEST LAFAYETTE -- The impact of the PED virus in swine was felt most strongly during the unusually harsh winter months of December through February, Purdue University agricultural economist Chris Hurt said Monday. He said this means the losses of bab

    April 4, 2014

  • Study reveals farmers' buying preferences, concerns WEST LAFAYETTE -- Agribusiness leaders nationwide can use results from a new Purdue University study to help them become more successful by understanding their farmer customers better. The Large Commercial Producer Survey, conducted every five years

    April 4, 2014

  • USDA extends Milk Income Loss Contract program for 2014 WASHINGTON -- U.S. Department of Agriculture (USDA) Farm Service Agency (FSA) Administrator Juan M. Garcia today announced the extension of the Milk Income Loss Contract (MILC) program. The extended MILC protects dairy farmers enrolled in the program

    April 4, 2014

  • U.S., South American soybean farmers unite in China ST. LOUIS - Farmers representing countries that produce 90 percent of the world's soybeans recently met with the customers who buy 25 percent of the world's soybeans. As part of the International Soy Growers Alliance (ISGA), leaders from the soy chec

    April 4, 2014

  • Wheat producers need to inspect crop as it breaks dormancy WEST LAFAYETTE - One of Indiana's coldest, snowiest winters in recent history could have damaged some of the state's winter wheat crop - a fact that necessitates field scouting, a Purdue Extension agronomist says. While snow cover insulates winter wh

    March 28, 2014

  • Home gardeners: 'Don't be fooled' by spotty nice weather WEST LAFAYETTE - Planting a home garden at the first sign of spring weather might cause big problems later, especially when more freeze days are likely ahead, a Purdue Extension horticulture specialist says. "Don't be fooled by the odd warm day we wi

    March 28, 2014

Featured Ads
AP Video
Captain of Sunken SKorean Ferry Arrested Raw: Fire Destroys 3 N.J. Beachfront Homes Raw: Pope Presides Over Good Friday Mass Raw: Space X Launches to Space Station Superheroes Descend on Capitol Mall Man Charged in Kansas City Highway Shootings Obama Awards Navy Football Trophy Anti-semitic Leaflets Posted in Eastern Ukraine Raw: Magnitude-7.2 Earthquake Shakes Mexico City Ceremony at MIT Remembers One of Boston's Finest Raw: Students Hurt in Colo. School Bus Crash Raw: Church Tries for Record With Chalk Jesus Raw: Faithful Celebrate Good Friday Worldwide Deadly Avalanche Sweeps Slopes of Mount Everest Police Arrest Suspect in Highway Shootings Drought Concerns May Hurt Lake Tourism Vermont Goat Meat Gives Refugees Taste of Home Calif. Investigators Re-construct Fatal Bus Cras Mayor Rob Ford Launches Re-election Campaign Appellate Court Hears Okla. Gay Marriage Case
Hyperlocal Search
Premier Guide
Find a business

Walking Fingers
Maps, Menus, Store hours, Coupons, and more...
Premier Guide
Parade
Magazine

Click HERE to read all your Parade favorites including Hollywood Wire, Celebrity interviews and photo galleries, Food recipes and cooking tips, Games and lots more.