Crop & Pest Report
The IPM survey scouts visited 124 wheat fields last week. Tan spot was detected in approximately 84% of the wheat fields.
We have observed many rust diseases in the last couple weeks...
The IPM Crop Scouts have surveyed over 50 sunflower fields in the last two weeks and found downy mildew in approximately half of them.
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.
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.
IPM scouts are detecting increasing numbers of banded sunflower moths in pheromone traps.
Wheat midge is near the end of its flight...
One to two sunflower moths per trap per week were detected in IPM scout’s pheromone traps in Golden Valley, Stark and Cass Counties.
The soybean aphids have arrived right on time!
The following is from an email thread with Dr. Kirk Howatt, NDSU Weed Scientist.
Maps detailing corn accumulated daily growing days, percent normal rainfall, departure from normal average air temperature, and accumulated wheat growing degree days.
Information from the Northeast region of North Dakota.
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.
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.
Stripe rust of wheat was observed in Renville County, ND in winter wheat on July 15, 2014
We have received many questions about dying soybeans. The cause is, at least in part, severe root rot in much of the state.
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.
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.
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).
Grasshopper nymphs are increasing in some areas (see maps below) and may start moving into field edges of crops.