Wheat Midge Resources
Wheat Midge Forecast Map
The Saskatchewan Wheat Midge Forecast Map for 2018 indicates greatly reduced risk from the insect pest for the province. Only a few areas, in the northern part of the grain-growing region and in the southeast, were identified to have higher populations of the wheat midge.
Good moisture favours this insect. The dry conditions in 2017 in much of Saskatchewan are the primary reason for the decline in wheat midge populations. Research has shown that if there is less than 25 mm of precipitation prior to the end of May, midge emergence will be affected. Emergence of the adult flies can be delayed, extended or erratic and may not coincide with the susceptible stage of the wheat crop.
Keep in mind that areas of infestation indicating more than 600 wheat midge per square metre on the wheat midge map may still result in significant damage and yield loss, especially if environmental conditions are favourable for the wheat midge. Not all fields are sampled. In the soil survey, 420 samples were collected to produce the 2018 forecast map. The intention of the forecast is to provide a regional representation of wheat midge populations present in the fall of 2017.
To determine midge populations and, if necessary, timing of an insecticide application, growers are urged to monitor conventional wheat fields during the susceptible period—when the wheat head becomes visible as the boot splits until mid-flowering (anthesis). Regular field scouting on successive nights is important to understand wheat midge population changes in a particular field. Temperature and wind conditions significantly influence egg-laying by the adult female midge. High temperatures and high winds tend to reduce activity of egg-laying female midge.
There are options for managing wheat midge. If spring wheat is planned as part of a rotation, there are midge-tolerant wheat varieties available as varietal blends (VB). For 2018, VBs are available in CWRS, CWES, CPSR and CWAD (durum) wheat classes. Visit the Midge Tolerant Wheat Stewardship Team’s website for information on midge-tolerant wheat and VBs. Also refer to the 2018 Saskatchewan Seed Guide for information.
Crop rotation to a non-host crop can also be considered. Since spring wheat is the primary host for wheat midge, planting a non-susceptible cereal crop (e.g. oats, barley) or a broadleaf crop (e.g. canola, pulse) is an option.
CLICK HERE for a PDF copy of the wheat midge map.
Cost-Benefit Analysis of using Midge Tolerant Wheat
Click on the image to the left to open the PDF document.
Midge Tolerant Wheat
The Midge Tolerant Wheat Stewardship Team is a broad industry coalition representing plant breeders, government, seed growers, seed distributors and producer groups. The team is committed to maintaining the viability of Midge Tolerant Wheat by educating Canadian wheat producers on the importance of proper stewardship of the technology.
Learn more at MidgeTolerantWheat.ca
A genetic and genomics approach to improving the milling potential of durum wheat
The objective of this project is to determine the distribution of ash content in the kernel of cultivars of durum wheat with variable expression; to develop and validate robust genotyping platforms for durum wheat with the specific focus on genetic mapping populations with a large range in phenotypic expression of milling potential; and to develop genomic selection prediction models using a combination of high density molecular data and robust milling data.view all