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Chapter Cf - Geography and the Environment
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Table Group Cf168-285 - The Environment
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Scott Farrow
Table Cf281-285 - Forestland damaged by insects: 1968-2000
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Cf281
Cf282
Cf283
Cf284
Cf285
Spruce budworm
Western spruce budworm
Gypsy moth
Mountain pine beetle
Southern pine beetle
Row
Year
Million acres
Million acres
Million acres
Million acres
Million acres
1
1968
1.3
5.3
0.1
----
----
2
1969
1.2
4.6
0.3
----
----
3
1970
2.0
4.0
1.0
----
----
4
1971
1.6
4.8
1.9
----
----
5
1972
2.8
5.5
1.4
----
----
6
1973
4.2
4.4
1.8
----
----
7
1974
10.8
5.5
0.8
----
----
8
1975
9.2
5.3
0.5
----
----
9
1976
9.1
5.8
0.9
----
----
10
1977
10.3
6.5
1.6
----
----
11
1978
7.7
5.2
1.3
4.0
----
12
1979
6.6
5.0
0.6
4.4
15.0
13
1980
6.6
4.0
5.0
4.7
12.1
14
1981
4.5
5.5
12.9
4.7
0.9
15
1982
4.2
8.7
8.2
4.2
7.3
16
1983
6.5
11.0
2.4
3.6
11.4
17
1984
6.1
10.6
1.0
3.3
----
18
1985
5.2
12.8
1.7
3.3
15.5
19
1986
1.0
13.2
2.4
3.5
26.4
20
1987
0.8
8.0
1.3
2.4
13.8
21
1988
0.3
6.1
0.7
2.2
7.9
22
1989
0.2
3.1
3.0
1.6
5.3
23
1990
0.2
4.6
7.3
0.9
4.2
24
1991
0.1
7.2
4.2
0.6
10.7
25
1992
0.1
4.6
3.1
15.8
1
14.3
26
1993
0.1
0.5
1.8
0.8
10.4
27
1994
1.0
0.5
0.9
0.4
5.3
28
1995
0.8
0.5
1.4
0.6
21.7
29
1996
0.5
0.3
0.2
0.3
7.3
30
1997
0.4
0.4
Z
0.3
8.5
31
1998
0.4
0.8
0.4
0.3
6.8
32
1999
0.1
0.5
0.5
0.4
6.2
33
2000
Z
0.6
1.6
0.5
12.1
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