Statistical data

1. Select area

2. Select year

Disturbance (Manitoba)
	2021	2020	2019	2018	2017	2016	2015	2014	2013	2012	2011	2010	2009	2008	2007	2006	2005	2004	2003	2002	2001	2000	1999	1998	1997	1996	1995	1994	1993	1992	1991	1990
Insects ^{Footnote 1}
Area defoliated by insects and containing beetle-killed trees (hectares)		2,688,047	1,060,869	623,173	1,068,179	1,639,571	1,484,218	909,830	307,264	240	754	40,550	1,216	22,589	178,303	50,420	72,156	96,894	149,503	98,114	95,939	73,379	68,020	170,209	112,319	61,585	44,053	53,046	18,650	77,153	101,273	49,703
Balsam fir sawfly
Forest tent caterpillar		3,067	714	33,946	403,704	1,411,322	1,411,322	904,126	210,361															97,959	35,397	1,719	200	4,500	3,600	51,153	58,082	15,178
Gypsy moth
Jack pine budworm		2,580,547	1,025,850	552,118	638,181	199,799	3,285	4,346	311
Mountain pine beetle
Spruce beetle
Spruce budworm		104,433	34,305		388	12,597			1,163	240	754	40,550	1,216	22,589	178,303	50,420	72,156	96,894	149,503	98,114	95,939	73,379	68,020	72,250	76,922	59,866	43,853	48,546	15,050	26,000	30,500	18,985
Western spruce budworm
Other insects				37,109	25,906	15,853	69,611	1,358	95,429																						12,691	15,540
Fires ^{Footnote 2}
Area burned (hectares)	1,266,777	49,303	71,337	234,477	224,424	39,158	69,193	39,208	1,115,457	217,508	128,812	189,260	3,292	154,923	336,881	167,550	75,292	27,520	941,379	96,940	81,021	113,315	110,454	450,572	41,799	125,326	889,237	1,428,786	67,274	433,774	150,986	16,145
Number of fires	460	155	284	483	566	207	463	246	496	499	323	589	186	398	383	684	254	57	1,209	760	533	357	613	516	373	424	662	555	239	298	672	562

Footnotes

Footnote 1

Insects

Source: National Forestry Database. Forest insects – Forest insects, Table 4 Area of moderate to severe defoliation (including beetle-killed trees) by insects. (accessed June 21, 2022).

Notes:

Forest area disturbed by defoliators (e.g., budworms, Lymantria dispar) includes only areas with tree mortality or moderate to severe defoliation. Defoliation does not always result in mortality. Several factors, including defoliation severity, duration, and frequency, or presence of other stressors (e.g., drought), can affect the level of mortality.
Forest area disturbed by bark beetles (e.g., mountain pine beetle, spruce beetle) is derived from aerial surveys that map trees that are dead or dying from successful beetle attack.
Summing the areas affected by more than one insect to create a grand total can result in an overestimate if more than one insect species occurs in the same stand in the same year. For example, in a mixedwood forest, spruce budworm may defoliate balsam fir in the same stand where forest tent caterpillar is defoliating the aspen trees.

Footnote 2

Fires

Sources:

National Forestry Database. Forest fires, Table 3.1.1, Number of fires by cause class. (accessed June 21, 2022).
National Forestry Database. Forest fires, Table 3.2.1, Area burned by cause class. (accessed June 21, 2022).

Note:

The National Forestry Database sources the latest year’s fire data from the Canadian Interagency Forest Fire Centre and all years prior from the Canadian Wildland Fire Information System.