For wheat growers, it's a truism: Plant varieties that are resistant to prevalent diseases. But what if the wheat plant has to pay a price for resistance, possibly reducing its yield? Is the resistance worth it?
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.
A waterhemp population from southeast Nebraska has been confirmed to be resistant to 2,4-D, but the resistant population is believed to be limited to a few fields.
Between this year’s harvest and next spring’s planting, winter annual weeds can take over fields, but a fall burndown application can knock down weeds and set up growers for a strong 2011 crop
It’s that time of year to sample fields for soybean cyst nematode, and new Ohio State University research is indicating that soybean producers may need to double up their efforts to analyze soil for eggs.
Michigan joined the list this year, and no-tillers heavily reliant on glyphosate for weed control are at particular risk of developing resistance in their fields.
Earlier this year, Michigan became the sixteenth state in the country to confirm a case of glyphosate-resistant horseweed when it was discovered in a Christmas tree plantation.
Asian soybean rust is a foliar disease, notes Glen Hartman, a plant pathologist at the University of Illinois who is heavily involved in preparing the U.S. for its arrival, “and tillage per se should not interact with rust incidence or severity.”
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On this episode of Conservation Ag Update, brought to you by Martin-Till, Brian and Darren Hefty, fourth-generation farmers and hosts of Ag PhD, share tips for treating tar spot in corn.
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