Wheat Entomology Newsletter

We are excited to begin our fourth year conducting the Wheat Entomology Newsletter! Our team is led by Dr. Punya Nachappa, entomologist and Associate Professor in the Department of Agricultural Biology (www.nachappalab.com). Adam Osterholzer, our Research Associate in the CSU Wheat Entomology Program. We welcome wheat pest questions from growers, please don’t hesitate to reach […]

2023 Colorado Wheat Stem Sawfly Survey Report

Research Assistant Authors: Ashley Raffa, Anne Sellman, Johanna Merkel, Zhi Mei Maria Lee, Ella Stankiewicz Adam Osterholzer: adam.osterholzer@colostate.edu, 970-222-9568 Dr. Punya Nachappa: Punya.Nachappa@colostate.edu, 785-383-4873 Colorado state-wide wheat stem sawfly survey The CSU Wheat Entomology Program, with the support of Colorado Wheat, conducts an extensive annual state-wide survey for wheat stem sawflies. For over a decade, […]

Wheat Entomology Newsletter – June 26, 2023

Adam Osterholzer: adam.osterholzer@colostate.edu, 970-222-9568 Dr. Punya Nachappa: Punya.Nachappa@colostate.edu, 785-383-4873 Grass sawfly We have not observed any grass sawfly larvae in our field surveys. This suggests that the larvae have matured and have dropped to the soil. They will form pupae in the soil in which they will remain until the following spring. We will monitor […]

Wheat Disease Newsletter – June 20, 2023

Dr. Robyn Roberts Field Crops Pathologist and CSU Assistant Professor Robyn.Roberts@colostate.edu* 970-491-8239 *Email is the best way to reach me Disease Observations Stripe rust Stripe rust has been spotted at low incidence and severity across much of Colorado’s wheat growing region (Figure 1). While the weather in Colorado has been conducive to stripe rust disease […]

Wheat Entomology Newsletter – June 12, 2023

Adam Osterholzer: adam.osterholzer@colostate.edu, 970-222-9568 Dr. Punya Nachappa: Punya.Nachappa@colostate.edu, 785-383-4873 Wheat field days It was so great to see many of you during Wheat field days and to see the wheat crop looking so gorgeous! Thanks to Sally and her team, Colorado Wheat, and our growers for their support! New sawfly in wheat-grass! We are sorry […]

Wheat Disease Newsletter – June 7, 2023

Dr. Robyn Roberts Field Crops Pathologist and CSU Assistant Professor Robyn.Roberts@colostate.edu* 970-491-8239 *Email is the best way to reach me Thank you to all who attended the Colorado Wheat Field Days! We certainly lucked out with the weather, and it was great to see you all again. DISEASE OBSERVATIONS Stripe rust Stripe rust has been […]

Wheat Entomology Newsletter – May 30, 2023

Adam Osterholzer: adam.osterholzer@colostate.edu, 970-222-9568 Dr. Punya Nachappa: Punya.Nachappa@colostate.edu, 785-383-4873 Wheat Stem Sawfly We have continued our sweeps twice per week at Orchard and New Raymer, CO. This month’s average catch has deviated significantly from what we observed throughout the month of May in previous years. For example, on May 17th, 2022, our average catch was […]

Colorado Wheat Disease Newsletter – May 23, 2023

Dr. Robyn Roberts Field Crops Pathologist and CSU Assistant Professor Robyn.Roberts@colostate.edu* 970-491-8239 *Email is the best way to reach me SUMMARY The recent rain across much of Colorado has favored development of fungal diseases. Additionally, the first report of plants testing positive for Wheat streak mosic virus and Triticum mosaic virus was collected from ARDEC. […]

Wheat Entomology Newsletter – May 15, 2023

Adam Osterholzer: adam.osterholzer@colostate.edu, 970-222-9568 Dr. Punya Nachappa: Punya.Nachappa@colostate.edu, 785-383-4873 Website: www.csuwheatentomology.com Wheat Stem Sawfly We recorded our first sawfly capture of the season on May 8th at Orchard, CO. Two male sawflies were found in our sweeps ~10 miles south of Highway 14. Males typically emerge a few days prior to females. With the forecast […]

Colorado Wheat Disease Newsletter

Dr. Robyn Roberts Field Crops Pathologist and CSU Assistant Professor Robyn.Roberts@colostate.edu* 970-491-8239 *Email is the best way to reach me Disease Observations Root Rot A root rot disease was found in a few fields in Kit Carson County in spotty areas (Figure 1). Root rot pathogens generally favor wet weather and mild soil temperatures for […]