Crop & Pest Report




Palmer Amaranth Confirmed in North Dakota (08/30/18)

Palmer amaranth (Amaranthus palmeri) a member of the pigweed family was found in North Dakota for the first time. Laboratory analysis confirmed that a plant found in a row crop field in McIntosh County in southcentral North Dakota is Palmer amaranth.

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Does Waterhemp Outcross with Powell Amaranth or Redroot Pigweed? (08/16/18)

Academicians teach agriculturalists to identify pigweed species by the presence or absence of hair on leaves and stem. Redroot and Powell pigweed have very small fine hairs throughout the plant.

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What’s that Grass? (08/16/18)

There is a new player in North Dakota. At least I can’t find reference to it having been here before.

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Pigweed Identification using Flowering Structure (08/16/18)

Pigweed (Amaranthus species) are in full flower. I thought it might be a good idea to refresh weed identification skills based on characteristics of the flowering structure.

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Mechanical Weed Control: Mowing, Hoeing and Pulling (07/26/18)

Rows have closed in most soybean, dry bean and sugarbeet fields.

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You Have Crop Damage from a Pesticide Misapplication, Now What? (07/19/18)

The first thing I tell farmers: “mark the date on the calendar.” Next, do a survey of your land and quantify how many acres are impacted and the locations of those impacted areas.

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Why is my Pigweed Different than your Pigweed? (07/12/18)

Every field season creates interesting observations that reestablishes normal. One observation in 2018 is the redistribution of weeds.

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Resources for Coping with Pesticide Damage - Includes Additional Tools For 2018 (07/12/18)

Whether it is spraying the wrong field, not cleaning the sprayer sufficiently, drift to sensitive crops/plants, or taking out a garden-all of these reasons, and many more, can cause major problems.

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Herbicide Tolerant Kochia (06/28/18)

Kochia has been a weed control challenge for North Dakota growers for decades.

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Horseweed Control in Soybean (06/28/18)

Horseweed (some call it marestail) is an annual broadleaf weed native to North America.

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Are Inversions Really that Common? (06/21/18)

Pesticide applicators have long been obliged and directed by pesticide labeling to understand, identify, and NOT apply during air temperature inversions.

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Sprayer Cleanout: Quality of the Job is More Important than Quantity of Water (06/07/18)

I walked several fields last week that were damaged by herbicides that were tank contaminants from a previous job, in a previous field.

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How do Weeds Grow under Hot and Dry Conditions? (5/31/18)

Weather in eastern North Dakota and west central Minnesota has been unseasonably hot and dry.

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Dicamba Discussion (05/24/18)

I know you have heard the concerns about dicamba a hundred times. I am not going to restate everything that has been covered over the winter, but I wanted to point out a couple things that came up as a few of us were having a discussion about dicamba this morning specifically related to use in Xtend soybean.

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Off-Target Movement of the New Dicamba Formulations in 2018? (05/24/18)

Collectively, agriculturalists across the major soybean and cotton growing states are hoping for a much more successful year compared to 2017. No matter how you slice it, 2018 will not and cannot be a repeat of 2017.

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Spotty Rains mean Preemergence Herbicides did not get Activated and there are Weed Escapes (05/24/18)

Many growers used preemergence herbicides but have not received sufficient precipitation to activate herbicides. Don’t worry about the PREs, they will get activated when it rains. The question is what to do about the emerged weeds. Control them as soon as possible since small weeds are easier to control than large weeds.

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It Didn’t Rain. What is the Fate of my Soil-Applied Herbicide? (05/24/18)

The message to use a preemergence herbicide in 2018 was well received for growers with fields where waterhemp is their primary weed. There was a flurry of activity last week to apply preemergence products and to take advantage of the forecast for rain. Some received precipitation; many did not or not in quantities sufficient to activate preemergence herbicides.

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Waterhemp has Emerged (05/17/18)

We anticipated waterhemp to germinate and emerge around May 10 in west central Minnesota and May 15 in the southern valley.

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Andrew Thostenson

The Pesticide Label in the Era of Dicamba Tolerant Crops (05/17/18)

Considerable ink and terabytes of information has been published about the new dicamba formulations. But I want to share with you the competing needs or perspectives various entities have with regards to pesticide labels.

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Essential Look-up Sites for Applying the New Dicamba Formulations Registered for DT Soybeans (05/10/18)

For years applicators have been told that “everything you need to know about applying a pesticide can be found on the label”.

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