Thursday, June 9, 2016

Watch for Cereal Aphids in Winter and Spring Wheat / Small Grain Survey Maps for Minnesota and North Dakota



Cereal aphid Infestation levels in recent weeks 
illustrate the northward movement to HRSW 
from the earlier infestations of Winter Wheat in 
southern MN.
Field reports from Minnesota (MN) indicate that the cereal aphids reported in winter wheat in early May, many of which were treated at the time of herbicide/fungicide applications, are now moving to spring wheat in those southern areas of MN. Surveys are also detecting movement and colonization northward to central and northern HRSW areas of MN. In North Dakota and Minnesota, IPM Scouts are finding these increasing populations, so continue to scout fields for cereal aphid population buildups.

Small Grain Survey maps are now available on a weekly basis and can be accessed for viewing:
  • crop development
  • disease observations, both incidence (% infested plants) and severity (level of infection)
  • insect infestations

Links to the survey maps are at the top of the right column or can be found at:  

Wednesday, June 8, 2016

Weed identification

Whether you are a novice or a veteran, if you need some references for weed identification, here are some resources through University of Minnesota Extension. There are also many references available for your smartphone that you can take to the field.

Got weeds? U of M Extension has resources


Managing herbicide resistance and controlling resistant weeds is a challenge. The U of MN Extension Crops Team is offering new video and web resources to help manage these difficult to control weeds:
  • Weed management website – includes resources on herbicide resistance management, weed identification, herbicide application and chemistry, and research reports.
  • Herbicide resistant waterhemp (video) – Waterhemp has an extended emergence pattern, making it difficult to control. Results from a 2015 trial demonstrating the effectiveness of layering residual herbicides for herbicide-resistant waterhemp control are shown in this video.
  • Herbicide resistant giant ragweed (video series) – Due to its large seed and early emergence, giant ragweed can be difficult to control. This video series describes a study looking at alternative management practices to control this herbicide-resistant weed.

To see additional videos from the U of M Crops Team, visit: https://www.youtube.com/user/UMNCrops.