Fusarium head blight in western Canada

Maps

Average daily mean temperature in July

Temperature map: text version and Precipitation map: text version

This map divides the agricultural area of the prairies into 5 distinct zones in regards to average July temperatures. Temperatures in Manitoba are 19 to 20 degrees in the south and 18 to 18.9 in the north. Saskatchewan is 19 to 20 in the southeast, 18 to 18.9 in the southwest, and 17 to 17.9 in the north. Alberta ranges from 18 to 18.9 in the south, 16 to 16.9 in the centre, and 15 to 15.9 in the north.

Average level of July precipitation on the prairies, 1981-1990

Map of the average level of July precipitation on the prairies, 1961-1990 — FHB is most successful when rainfall occurs during the flowering stage, usually in July. This map shows the 30-year average precipitation for July in the crop districts of western Canada. Many areas of western Canada have precipitation levels in July equivalent to those of southern Manitoba, indicating that moisture levels at flowering will likely promote further westward spread of Fusarium graminearum.

Temperature map: text version and Precipitation map: text version

This map divides the prairies into 3 distinct areas with regards to July precipitation. On a 30 year average, seventy millimeters or more of rain falls in most of Manitoba and the northern agricultural areas, sixty to sixty-nine millimeters in the southwest Manitoba and southeastern Saskatchewan, and fifty-nine millimeters or less falls in southwest Saskatchewan and southern Alberta.

Average level of fusarium-damaged kernels in Canada Western Red Spring wheat, 1995 to 2006

These maps show the average level of fusarium-damaged kernels in Canada Western Red Spring wheat samples collected at the Canadian Grain Commission. Most of the wheat samples from western Canada had little to no FDK. Areas with the highest levels are those where Fusarium graminearum is the primary causal agent. No map is available for 2004. See maps below.

Average level of FDK in CWRS, 2006

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2006

Average level of FDK in CWRS, 2005

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2005

Average level of FDK in CWRS, 2003

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2003

Average level of FDK in CWRS, 2002

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2002

Average level of FDK in CWRS, 2001

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2001

Average level of FDK in CWRS, 2000

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 2000

Average level of FDK in CWRS, 1999

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 1999

Average level of FDK in CWRS, 1998

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 1998

Average level of FDK in CWRS, 1997

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 1997

Average level of FDK in CWRS, 1996

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 1996

Average level of FDK in CWRS, 1995

Map showing the average level of FDK in CWRS wheat samples collected at the CGC, 1995

The distribution of Fusarium graminearum and soil zones on the prairies, 1994 to 2008

These maps show locations where Fusarium graminearum has been recovered from FDK based on seed surveys done at the Grain Research Laboratory between 1994 and 2008. In 1994, it was mostly restricted to Manitoba and eastern Saskatchewan. By 2002, it was observed in all areas of the prairies. Most positives are in the black soil zone along the northern boundary of the agricultural area of western Canada. This area has the highest average rainfall. However, the northern areas also have lower temperatures than the southern areas and this may serve to moderate disease levels.

Fusarium graminearum one of four species in Canada that cause FHB and is the most important. Fusarium graminearum had been found mostly in black soil zones, which are also areas of highest precipitation. See maps below.