Crop & Pest Report
Scouts were able to visit 162 wheat fields and 19 barley fields last week. Tan spot was recorded in 103 wheat fields and severity levels have increased compared to previous weeks.
As canola enters bloom, the crop becomes susceptible to white mold. Fungicides are available that can help manage the disease, so the important decision many growers will face is whether or not the environment is favorable for infection and disease development.
Severity values for late blight have increased quite rapidly over the past two weeks.
As a result of the recent and almost constant rain in many regions of the state, one can see the evidence of too much soil moisture.
The early part of the 2014 growing season has brought significant precipitation events throughout North Dakota as well as northwestern Minnesota, resulting in excessively wet fields.
Aster leafhoppers were found in only 20% of the canola field surveyed from June 21-25 in North Dakota and Minnesota.
Soil samples in North Dakota indicate increasing levels of overwintering wheat midge larvae (cocoons) in localized areas for the 2014 season.
Adult Colorado potato beetles are emerging now from overwintering sites. The adult is 3/8 inch long, with oval body and a yellow-brown with 5 black stripes on each wing cover.
The updated degree day map for leafy spurge flea beetles (Aphthona species) indicates that land managers can scout and/or collect adult flea beetles in North Dakota, based on the sunflower GDD model from NDAWN.
An isolated Hessian fly infestation was found in Syngenta’s hard red spring wheat variety trial near Beach in SW ND.
Maps detailing corn accumulated daily growing days, percent normal rainfall, departure from normal average air temperature, and accumulated wheat growing degree days.
Most areas of Eastern North Dakota and Minnesota have received excessive amounts of rainfall in June.
Weeds continue to emerge and are actively growing in sugarbeet fields in Eastern North Dakota and Minnesota as a result of recent widespread precipitation.
This may possibly be the most important Crop and Pest Report article (weeds) written in the 2014 cropping year.
On my way to and from Devils Lake today, nearly every field of soybean had symptoms of iron deficiency chlorosis (IDC). Therefore, a short review is in order.
I have stated at many meetings that the high clay soils in the Red River Valley are high enough in organic matter and have a high enough sulfatic water table that sulfur fertilization is not needed. However...
The row crops in our region look as poor now as in 2011, our last perpetually wet spring.
With prevented planting (PP) more common throughout North Dakota, using cover crops to prepare the land for next year is a desirable option.
Crop scouts are reporting low incidence of canola blackleg in Bottineau County.