Crop & Pest Report
Maps detailing corn accumulated daily growing days, percent normal rainfall, departure from normal average air temperature, and accumulated wheat growing degree days.
Kathy Wiederholt of Carrington Research Extension Center trapped the invasive spotted wing Drosophila in cantaloupe from a compost pile in Carrington in Foster County on Monday, July 21st.
currently has an approved label for Sharpen herbicide as a harvest-aid / desiccation application for cotton, soybean, dry bean, field pea, lentil, chickpea, canola, safflower, and sunflower, however, the MRL's (Maximum Residue Levels) supporting the harvest-aid / desiccation uses have not been cleared for all countries.
Last week we wrote an article about the high levels of soybean root rots showing up in the region. Although multiple pathogens can cause root rots on soybeans, Rhizoctonia has been consistently showing up this year.
During the past two weeks, I had the opportunity to visit several winter wheat production fields and winter wheat variety trials located on NDSU Extension and Research Centers.
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.
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.
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.
Wheat midge is near the end of its flight...
IPM scouts are detecting increasing numbers of banded sunflower moths in pheromone traps.
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.
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.
IPM scouts trapped banded sunflower moth at one location near Carrington REC in Foster County, so emergence is beginning.
The IPM Crop Scouts have surveyed over 80 soybean fields last week and no soybean aphids were observed in North Dakota.