Crop & Pest Report

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Crop & Pest Report

Forage Nitrate and Mycotoxin Testing (6/29/17)

The Veterinary Diagnostic Lab’s Toxicology staff performs the mycotoxin and nitrate analysis of forage.

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Glyphosate + 2,4-D Compatibility – Part 2 (6/29/17)

Question: I have been following the delay on Enlist registration from the inference that there is ‘synergy’ when glyphosate and 2,4-D are mixed together. Is there any truth to this potential antagonism?

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Glyphosate + 2,4-D Compatibility – Part 1 (6/29/17)

Question: What causes glyphosate + 2,4-D to ‘set-up’ in the sprayer and plug screens and nozzles? Is it just a freak thing that happensoccasionally? It happened two times this week. One of the guys is just dumping his right in the top of the tank. They are putting the glyphosate first then adding the 2,4-D separately, so they are not touching in the cone. The AMS was added last.

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Grazing Restriction for 2,4-D (6/29/17)

Question: I am wondering why there is a 30 day after application haying restriction for 2-4-D when there are no grazing restrictions. I have been getting calls asking about these haying restrictions.

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Severe Iron Deficiency Chlorosis (IDC) Causes in Eastern North Dakota (6/29/17)

Dr. Goos is a wonderful chemist in the NDSU Soils Department and it is his work that resulted in the first years of the regional IDC screening of varieties that Dr. Kandel now administers along with Dr. Helms, the NDSU soybean breeder.

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Scout Sugarbeet Fields to Check for Presence of Fusarium Yellows and Fusarium decline (6/29/17)

Fusarium yellows/Fusarium decline were first observed in May at the NDSU research site in Moorhead, MN.

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Fungicide Efficacy and Timing Questions on Fusarium Head Blight (Scab) (6/29/17)

Small grains in western ND have headed with most of the crop past the flowering growth stages.

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Guidelines for Haying Drought Damaged Small Grains (6/29/17)

The severe drought that is currently affecting parts of the state is limiting crop and pasture growth.

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Cover Crop Establishment in Corn and Soybean (6/29/17)

Current research is being conducted involving interseeding a number of cover crops into established corn and soybean.

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Collect Flea Beetles for Leafy Spurge Control (6/29/17)

To determine when to begin collecting adult Aphthona flea beetles, use the accumulated growing degree days (AGDD) for sunflower (base of 44 F) on NDAWN - sunflower degree days/growth stage application.

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Wheat Midge Emerging & 2017 Forecast (6/29/17)

Soil samples collected in North Dakota from 2016 indicated low levels of overwintering wheat midge larvae (cocoons) for the 2017 season.

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Pea Leaf Weevil Found in North Central Region (6/29/17)

Pea leaf weevil larvae were collected from a pea field located northwest of Plaza last week.

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South Central ND (6/29/17)

Information from the South Central region of North Dakota.

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Interesting Red Mite (06/22/17)

Are you are seeing bright red spots moving around on top of the soil?

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South Central ND (6/22/17)

Information from the South Central region of North Dakota.

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Northeast ND (06/22/17)

Information from the Northeast region of North Dakota.

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You Can Take the Birch out of the Forest But… (06/22/17)

Birch trees are found in cool northern forests where the soil is slightly acidic.

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Why No AMS is Allowed with Dicamba in Dt Soybean (06/22/17)

Question: The chemical companies have told us that AMS is not allowed with dicamba on DT soybean. They say AMS will increase the volatility and may result in dicamba drift to susceptible plants and crops. They tell us what not to do but they don’t tell us why AMS increases volatility. What does AMS do?

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How Clethodim to Injure Corn? (06/22/17)

Question: A grower sprayed glyphosate plus clethodim (select) on his soybean to kill weeds and volunteer corn. The grower did not clean the tank after the last load and filled the next tank with just glyphosate to spray his RR corn. The results looked like the photo to the right. Can there be enough clethodim in the spray system from the previous load to cause this injury?

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Glufosinate Not Control Lambsqurters (06/22/17)

Question: I sprayed generic Liberty “Interline” at 1pm in the afternoon on a field of soybeans. It controlled all weeds except lambsquarters. There is no control of this weed and my neighbors also had no control. I used 32 fl oz/A of Interline, 20 GPA water, 3 lbs AMS/A, and droplet size at 286 microns. The conditions were perfect for good control last week. Why didn’t the generic Liberty kill the lambsquarters? I will need to respray all my fields again. How do we achieve control? Has anyone looked at different additives with Liberty?

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