Crop & Pest Report

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Crop & Pest Report

ppth.markell.2.tan spot percent incidence

Wheat Disease Update (07/24/14)

The IPM survey scouts visited 124 wheat fields last week. Tan spot was detected in approximately 84% of the wheat fields.

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ppth.friskop.1.corn rust

Rust Review (07/24/14)

We have observed many rust diseases in the last couple weeks...

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ppth.markell.1.snflr dwny mildw percent incidence

IPM Crop Scouts Detecting Downy Mildew in Sunflower (07/24/14)

The IPM Crop Scouts have surveyed over 50 sunflower fields in the last two weeks and found downy mildew in approximately half of them.

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plsc.kandel.1.soybean root nodules

Soybean Root Nodules (07/24/14)

With the right kind of Rhizobia bacteria, nodules may form on the soybean roots. With this symbiotic relationship between the bacteria and the soybean plant, nitrogen gas is fixed into a plant-available nitrogen form.

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Cercospora Leaf Spot Alert (07/24/14)

Cercospora leaf spot is the most devastating foliar disease of sugarbeet in Minnesota and North Dakota. The disease is caused by the fungal pathogen Cercospora beticola.

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ent.knodel.4.banded sunflower moth

Time to Scout for Banded Sunflower Moth (07/24/14)

IPM scouts are detecting increasing numbers of banded sunflower moths in pheromone traps.

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ent.knodel.7.wheat midge dd and wheat growth stages

Wheat Midge Update (07/24/14)

Wheat midge is near the end of its flight...

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ent.knodel.3.sunflower moth trapping

Sunflower Moth Detected in Traps (07/24/14)

One to two sunflower moths per trap per week were detected in IPM scout’s pheromone traps in Golden Valley, Stark and Cass Counties.

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ent.knodel.1soybean growth stages

Scout for Soybean Aphids (07/24/14)

The soybean aphids have arrived right on time!

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Small Grain Herbicides with Fungicides (07/17/14)

The following is from an email thread with Dr. Kirk Howatt, NDSU Weed Scientist.

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wthr.akyuz.corn

Weather/Crop Phenology Maps (07/17/14)

Maps detailing corn accumulated daily growing days, percent normal rainfall, departure from normal average air temperature, and accumulated wheat growing degree days.

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North-East ND (07/17/14)

Information from the Northeast region of North Dakota.

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Unintentional (and Unware) Herbicide Movement (07/17/14)

The following is from a ND grower who has made an interesting observation. It may be too late to rectify these ‘trespasses’ this year but we can be mindful next year to reduce this potential source of crop injury as much as possible.

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New Corn Fertility Recommendation Circular Posted on the Web (07/17/14)

The new North Dakota Corn Nitrogen Calculator was posted on my web site in late April. Now, the companion Corn Fertility circular is available on my web site and on the NDSU Extension web pages.

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ppth.chapara.stripe rust wheat

Disease Update: North Central North Dakota (07/17/14)

Stripe rust of wheat was observed in Renville County, ND in winter wheat on July 15, 2014

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ppth.markell.nelson.damping off in soybean

Soybean Root Rots (07/17/14)

We have received many questions about dying soybeans. The cause is, at least in part, severe root rot in much of the state.

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Glyphosate as a Pre-Harvest Aid in Small-Grains (07/17/14)

Winter wheat is approaching maturity and early planted barley is not far behind and therefore, harvest will soon be upon us. Glyphosate can be used as a pre-harvest aid in small grains to control green weeds and to speed up uniform ripening of the crop.

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plsc.kandel.tile drainage machine

Sub-Surface Water Management (07/17/14)

Tile drainage does not remove “plant available” water from the soil; it merely removes “gravitational” water that would drain naturally, if unimpeded by confining layers in the soil.

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ent.knodel.wheat midge 2013 larval survey

Wheat Midge Degree Day Map (07/17/14)

Continue to scout for wheat midge from heading through early flowering (<50% flowered), especially in areas where the 2013 fall soil survey indicated moderate to high risk for wheat midge larvae (see map on right).

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ent.knodel.adult grasshopper

Watch For Increasing Grasshoppers (07/17/14)

Grasshopper nymphs are increasing in some areas (see maps below) and may start moving into field edges of crops.

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