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Scout for Wheat Midge (06/28/18)

Wheat midge emergence is underway in the northern tier of North Dakota and will continue for the next 1-2 weeks depending on temperatures.

Scout for Wheat Midge

Wheat midge emergence is underway in the northern tier of North Dakota and will continue for the next 1-2 weeks depending on temperatures. Producers can access the wheat midge degree day model on North Dakota Agricultural Weather Network (NDAWN) to find out if their wheat is at risk (or in a susceptible wheat stage, heading to early flowering) during female wheat midge emergence (just enter your planting date and select the nearest weather station): https://ndawn.ndsu.nodak.edu/wheat-growing-degree-days.html. Female wheat midge is at 10% emergence with 1,300 accumulated degree days (ADD), 50% emergence with 1,475 ADD and 90% emergence with 1,600 ADD. The North Dakota Crop Progress and Condition News Release indicates that 27% of the spring wheat is headed (USDA NASS, News Release, June 25, 2018).

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ND Wheat Midge Trapping Data – June 15 – June 26, 2018

Since the 2018 Wheat midge forecast is low. Scouting is good insurance and could save you the cost of an insecticide over the field this year. Scout for the orange adult flies at night when temperatures are greater than 59 F and the winds are less than 6 mph. Use a flash light and slowly scan the heads of wheat plants for wheat midge adults, counting the number of flies per head.

The IPM trappers (Dan Kraemer at Fargo, Jace Paryzek at Williston REC, Traci Murphy at Langdon REC, and Bree Obergfell at NCREC) are using pheromone traps to monitor for wheat midge mainly in the northern tier of state. Trap catches are entered weekly into the PESTWEB system of Montana State University (see the map). Trap catches do not indicate treatment but do tell growers when wheat midge is present and the relative density of the male wheat midge. Only males are attracted to the pheromone lure in trap.

For more information about wheat midge, please consult the NDSU Extension IPM of the Wheat Midge in North Dakota E1330 (revised) and the Extension Entomology website on wheat midge.

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Janet J. Knodel

Extension Entomologist

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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