Harvest: Good to see harvest going and have heard some great bean yields! Also heard numerous reports of how hard it was to cut beans with green stems, bean stems falling over due to stem borer and winds, and beans running 9-11% moisture. There’s some chalky looking beans due to Diaporthe complex and purple seed stain was also observed in some varieties. Harvest safety is still the greatest priority. I don’t think I’ve heard of so many combine fires in one week as what we experienced last week in the U.S. and Canada, including several in Nebraska. Hopefully all the people were ok and the farmers can get going again somehow. Also, this past week was brutal driving with dust flying on gravel roads with sun glare at dusk. Lights on, stop at intersections and railroad crossings, please be safe!
Armyworms: Hopefully this is my last week talking about them! The questions have differed each week, so I share in hopes that it helps. We’ve just not seen these types of numbers for decades (from what I’m told). What has been interesting is hearing stories. One person who called me relayed a historical account of families and neighbors staying up all night driving up and down the roads squashing armyworms to keep them from crossing the roads into other fields. That’s dedication!
We put together a FAQ in CropWatch of common fall armyworm questions at: https://go.unl.edu/skx2. Last week the calls transitioned to pasture questions around products labeled for pastures with 0 day grazing restrictions with cattle present. Warrior II, Mustang Max, Beseige, Prevathon have 0 day grazing restrictions. You can see additional active ingredients, grazing, and haying restrictions at this website from Auburn Extension.
(Photo caption: armyworms in a pasture. You can typically find them in the edges between the brown/green. A lot of stress already in pastures due to drought. New growth observed shortly after insecticide application to kill the armyworms.)
Planting small grains and armyworms: I need to clarify from last week’s article that I didn’t mean to imply they needed to be seeded last week or immediately, just that they should still be seeded if that was in the plan. Ideally, yes, the sooner after harvest they’re seeded, the better establishment that typically occurs. But there are risks that one also needs to consider, such as the Hessian fly free date for wheat. For those who called, we discussed an option of a ‘wait and see’ approach where small grains for either grain or cover crop could still be planted in early October and still obtain good growth and establishment. Waiting after the Hessian fly free date (which occurs during various dates in late Sept. for Nebraska) and until the first full week of October may allow for enough cooler weather for the fall armyworms to head south and allow newly planted small grains to be established. We honestly don’t know when they will move south. Delaying till early October is one approach instead of trying to get small grains planted and being worried about scouting them for armyworms as they emerge while you’re also trying to harvest.
Cover Crop Seeding Rates for small grains (rye/wheat/triticale) is another question I’ve received. If seeding for erosion or even weed control, seeding rates of 20-35 lb/ac. are often fine. If you are receiving payment for EQIP or from another entity such as NRD or Pheasant’s Forever, they may specify the rate that needs to be seeded. For grazing, UNL typically says aim for a seeding rate of 60-70 lb/ac, but I’ve heard producers use anywhere from 40-80 lb/ac. Two publications with considerations for planting cover crops after corn or soybean can be found here: https://mccc.msu.edu/statesprovince/nebraska/.
Nebraska Extension Dean Interviews: If you’re interested, you can find information about the candidates here: https://ianr.unl.edu/dean-and-director-nebraska-extension. The public is invited to a meet and greet for the NE Extension Dean candidates on October 1, 6, and 8 from 5:30-7:30 p.m. at Raising Nebraska (state fairgrounds) in Grand Island. There is also a zoom link for these. If you’re interested in attending via zoom, please let me know and I’ll send you the links. At a time when Extension systems have been cut across the country and with systems in other states moving to regional instead of county-based models, it’s a critical time in Nebraska Extension’s history for the future of what Extension in Nebraska looks like. Would encourage you to attend and ask questions if you’re interested.
Posted on September 26, 2021, in Crop Updates, JenREES Columns and tagged fall armyworms, small grain cover crop seeding. Bookmark the permalink. Leave a comment.
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