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New Mutations for Herbicide Resistance Rarer than Expected, Study Finds

June 3, 2019 | Posted in Crop Protection

Source: University of Illinois News Bureau

Seeking to better understand herbicide resistance, researchers exposed more than 70 million grain amaranth seeds to a soil-based herbicide. Though preliminary, the findings suggest that the mutation rate in amaranth is very low, and that low-level herbicide application contributes little — if anything — to the onset of new mutations conferring resistance, say researchers at the University of Illinois.

Toxicity Considerations for Grazing Cover Crops

December 22, 2016 | Posted in Cover Crops

Source: Kansas State University Extension

Annual cover crops grown in place of fallow can provide high-quality forage during key production periods and may help reduce soil erosion, suppress weeds, and increase soil nutrient profiles, but some may not be suitable for forage or grazing, says Kansas State University Extension.

Zero Tolerance Required For Preventing Palmer Amaranth Problems

May 13, 2014 | Posted in Crop Protection

Source: Ohio State University

A news release from the Weed Science Society of America last week covered the results of a study in Arkansas cotton fields to determine the effect over time of releasing 20,000 glyphosate-resistant Palmer amaranth seeds in a patch, within a 1-square-mile area.

Palmer Amaranth Spreads In Iowa

February 26, 2014 | Posted in Crop Protection

Source: By Bob Hartzler, Extension Weed Specialist, Iowa State University

Palmer amaranth is native to the Southwest but has been expanding its range for at least 50 years. Most recently it has moved into the Midwest and has been reported in all Corn Belt states except for Minnesota and the Dakotas.

Common Factors In Glyphosate-Resistant Waterhemp

January 27, 2014

Source: Weed Technology

A study conducted in Missouri found three common field aspects for glyphosate-resistant waterhemp populations.

Fungus May Offer Natural Weed Control

November 21, 2013 | Posted in Crop Protection

Source: By Jan Suszkiw, USDA

A naturally occurring fungus may prove useful in the fight against Palmer amaranth, an aggressive southern weed that can grow at the rate of two inches a day and outcompete corn, cotton, soybean and other crops for resources, potentially reducing their yields.

Palmer Amaranth Resistant To Atrazine And HPPD inhibitors Confirmed In Nebraska

October 5, 2013 | Posted in Crop Protection

University of Nebraska-Lincoln greenhouse studies have confirmed a Palmer amaranth population resistant to postemergence application of atrazine and HPPD-inhibiting herbicides (Callisto, Laudis, Armezon/Impact). This is the second report (after Kansas) of a Palmer amaranth population resistant to atrazine and the HPPD group of herbicides.

Highly Erodible Land A Main Reason For Choosing No-Till For Some

By John Dobberstein posted on April 18, 2012 | Posted in Cover Crops, Crop Protection, Soil Health

After spending 2 days last week visiting farms in central North Carolina, it was apparent that no-tillers have a special respect for their farmland, and what can happen if it isn’t cared for.

Waterhemp Problems Spread To Indiana

September 30, 2011 | Posted in Crop Protection

Source: By Bill Johnson and Glenn Nice, Purdue Weed Science, Purdue University

Waterhemp has been present in Indiana field surveys for at least the last 10 years but recent control issues with glyphosate is moving this weed up on the radar of concern for Indiana growers.

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