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Angie Peltier

Angie Peltier
Former Extension Educator, Commercial Agriculture

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Hill and Furrow

Current topics about crop production in Western Illinois, including field crops research at the NWIARDC in Monmouth.
Figure. Marty Johnson and Brian Mansfield plant corn at the NWIARDC on April 21, 2014.
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Spring Field Operations

Planting Operations are Underway . Now that soil temperatures have become more favorable for seed germination, Northwestern Illinois Agricultural Research and Demonstration Center (NWIARDC) Research Agronomist Brian Mansfield and Research Specialist Marty Johnson have been hard at work planting corn during the past several days ( Figures ). They take turns operati...

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Figure. Counties shaded red have confirmed populations of Western corn rootworm that have evolved resistance to the Cry3Bb1 Bt trait. Counties highlighted in red had severe Western corn rootworm damaged first year corn in 2013 (Drs. Mike Gray and Joe Spencer).
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Western corn rootworm populations resistant to Bt (Cry3Bb1) close to home

Posted by Angie Peltier - Insects

Bacillus thuringiensis (Bt) is a bacterium. It naturally produces toxin proteins that create fatal holes in the digestive system of susceptible insects. In 2003, transgenic corn hybrids expressing a bacterial Bt toxin (Cry3Bb1) in root tissue with activity against the Western corn rootworm (WCR) were released for sale to corn producers. Since this time, seed corn companies have created...

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Figure. Unique herbicide resistance (first report of weed species   mode of action) cases in the U.S. (1975-2014) (source: Dr. Ian Heap,, 2014).
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Combating herbicide resistant weeds: new online tools to help producers select herbicides.

Posted by Angie Peltier - Weeds

The challenge. Now that soil temperatures have begun warming, in many fields weed seed germination and plant establishment has begun. Herbicide resistant weeds are complicating weed management throughout the Midwest. Throughout the past 40 years, more than 140 unique cases of herbicide resistant weeds have been documented throughout the U.S. ( Figure ). A...

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Figure. Daily minimum (dashed lines) and maximum (solid lines) 4 inch soil temperatures in March, 2014.

March 2014 Weather Summary

Posted by Angie Peltier - Weather

Temperature, snowfall and precipitation data listed below were collected at the Monmouth weather station located a little more than 4 miles from the Northwestern Illinois Agricultural Research and Demonstration Center (NWIARDC), while soil temperature probes are located at the NWIARDC. Temperature For the month of March, the average high air temperature was 41 d...

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