Ernst Undesser

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Iowa: Dicamba – Xtend Farmers Happy, Others Not So Much

I have been reluctant to provide estimates of soybean acres damaged from dicamba applied to Xtend soybean due to the difficulty in developing a...

Soybeans: Dicamba Injury? Someone Call CSI

Editor's Note: For charts and images, see original article at Source URL below. The potential use of a forensic analysis to identify the timing of...

Nebraska: Dicamba’s Effect on Soybean Node Numbers

The forensic analysis described here and in a previous CropWatch article assumes the 3.7-day soybean node accrual upon V1 continues despite effects from off-target...

Georgia Weeds: 6 Possible Reasons for Failed Grass Control

Getting plenty of calls about perceived reductions in grass control after applications of ACC-ase inhibiting herbicides, such as Select (clethodim) or Poast (sethoxydim), have...

Palmer Pigweed: Increased Resistance Doesn’t Reduce Plant Fitness

Within the Australian Herbicide Resistance Initiative (AHRI) research team we have a range of fitness levels. At one end of the scale we have...

North Dakota: Scout Now for Palmer Pigweed

Palmer amaranth, the No. 1 weed problem in the U.S., hasn’t been spotted in North Dakota yet, and the state’s agricultural producers would like...

Nebraska: Top Weed Problems and Most Common Herbicides

Stakeholders across Nebraska were surveyed during Nebraska Extension meetings about their top weed management issues. The survey was conducted at seven locations (Atkinson, Norfolk,...

Ohio: No Pigweed Left Behind – Late-Season Scouting for Palmer Amaranth,...

If you don’t already have to deal with waterhemp or Palmer amaranth, you don’t want it.  Ask anyone who does.  Neither one of these...

Iowa: Finding the Mile-a-Minute Weed

Mile-a-minute weed (Persicaria perfoliata) is an invasive species in the Polygonaceae (smartweed) family that is native to Asia.  It is believed to have been introduced...

Arkansas Rice: Hot, Dry Weather Leaves Tough-to-Fight Weeds

Rough weather conditions caused many Arkansas rice fields to be overrun with grassy weeds.  Tom Barber, extension weed scientist for the University of Arkansas System...

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