Area (ha) affected by insect defoliators from 81/82 to 98/99, by region


Year

Cariboo

Kamloops

Nelson

P. George

P. Rupert

Vancouver

TOTALS


81/82a  

11 735

   

22 420

500

34 655

82/83a

500

29 000

13 450

 

90 000

120

133 070

83/84a

18 875

80 400

53 685

10 850

152 650

25

316 485

84/85a

24 250

51 160

63 400

8 800

2 700

 

150 310

85/86a

48 750

183 570

200

400

2 200

30 750

265 870

86/87a

21 180

430 950

3 700

110 370

11 900

45 550

623 650

87/88a

20 250

839 550

12 725

79 400

 

17 100

969 025

88/89b

48 700

390 334

6 073

101 725

61 200

15 830

623 862

89/90b

2 800

148 420

22 600

127 950

 

12 280

314 050

90/91b

14 100

194 900

1 760

406 750

 

4 455

621 965

91/92a,b

8 900

422 210

12 261

245 200

500

 

689 071

92/93c

182 470

576 320

53 372

284 000

 

21 145

1117 307

93/94c

47 500

51 700

60 000

355 000

 

3 715

517 915

94/95d

100 520

33 835

7 600

241 100

 

1 900

384 955

95/96g  

2 000

1 000

118 688

 

200

121 888

96/97g

e

25 000

e

258 684

e

23 460

307 144f

97/98e              
98/99

187 266f

96 600f

f

1 884 572f

e

60 800f

2 229 238f


  1. Best available estimates. Accuracy varies, depending on the pest. Many more pests are endemic throughout most forests. Detailed measures of the intensity of the infestation are not available.
  2. Best available estimates of current annual losses. Accuracy varies, depending on the pest.
  3. Best available estimates of current area affected. Although more insects and diseases are endemic, detailed measures of the intensity of infestations are not available.
  4. Includes estimates of areas defoliated by western spruce budworm, Douglas-fir tussock moth, eastern spruce budworm, two-year cycle budworm, western hemlock looper, and western blackheaded budworm.
  5. Data not available.
  6. Data incomplete.
  7. Includes estimates of areas defoliated by western spruce budworm, eastern spruce budworm, two-year-cycle budworm and western hemlock looper. No defoliation was reported for Douglas-fir tussock moth in 1995 and 1996.

Data source: MoF annual reports.

To download the Excel data file for this table, click here.

Back to Silviculture -- Forest Health

Back to Silviculture Contents