Table 2. Growth rates of southern pine beetle infestations before and after application of suppression treatments in 1995.
Pre-Treatment
Post-Treatment
Infestation
No.
Mean
DBH
inches
Trees
Killed/
Day
Active
Trees at
Treatment
Verb
used
ml/ft2
Trees
Killed/
Day1
%
Growth
Reduction
VERBENONE-ONLY
GA-01
5.2
1.9
 35
86.2
0.7a
 63
GA-02
 6.0
1.8
 41
96.6
0.4a
 78
GA-03
 7.6
1.1
 27
28.9
0.6c
 45
AL-01
10.0
1.3
 29
51.9
0.3a
 77
AL-02
 6.0
2.6
 64
48.6
0.6a
 77
AL-03
 5.8
1.5
 55
40.1
0.2a
 87
AL-04
 8.6
2.7
 63
25.6
0.3a
 89
MS-1
17.4
0.9
 23
21.3
0.5c
 44
TX-01
 9.6
0.7
 41
54.9
0.2a
 74
TX-02
 4.8
1.9
 56
73.5
0.2b
 87
TX-03
 6.9
3.3
 71
42.3
0.2a
 93
TX-04
 8.2
0.4
 20
48.6
0.0a
 95
TX-05
 8.2
0.6
 17
48.2
0.1a
 88
TX-06
17.4
0.3
 15
26.2
0.4c
 25
TX-07
18.3
0.6
 29
33.5
0.3a
 55
TX-08
19.4
0.4
 25
23.0
0.1a
 72
TX-09
 8.0
1.5
 48
43.2
0.1a
 97
TX-10
10.1
0.8
 41
28.8
0.0a
100
TX-11
 6.8
1.7
 27
67.4
0.0a
100
TX-12
 9.7
2.3
 88
40.9
0.0a
100
Mean
9.7
1.5
42.2
48.0
0.3
 77.32
VERBENONE-PLUS-FELLING
NC-01
 8.1
1.6
 35
25.6
0.0a
 100
NC-02
 8.4
3.3
122
22.3
0.5a
 85
NC-03
 7.2
3.0
125
25.5
2.4c
 20
NC-04
 8.5
4.6
122
23.6
0.9b
 80
NC-05
16.0
1.3
 35
18.4
0.3b
 77
NC-06
 8.9
1.2
 52
23.1
0.0a
100
NC-07
 9.4
0.8
 37
24.0
0.0a
 98
GA-04
 6.3
1.2
 48
27.4
0.0a
100
GA-05
 7.3
2.4
 72
20.6
0.1a
 95
GA-06
 7.2
1.7
 58
49.1
0.0a
100
AL-05
 9.5
1.9
 38
29.4
0.1a
 95
FL-01
 9.4
2.6
 81
24.4
0.6a
 77
FL-02
 7.5
2.3
 54
36.1
0.4a
 83
TX-13
11.1
0.3
 30
29.4
0.0a
100
TX-14
12.8
1.4
 78
18.9
0.0a
100
TX-15
11
1.1
 46
26.4
0.0a
100
TX-16
 7.4
0.7
 31
28.0
0.0a
100
TX-17
 7.4
0.7
 41
28.5
0.0a
100
TX-18
 8.1
9.8
351
19.0
0.6a
 94
Mean
9.0
2.2
77
26.3
0.1
 89.12
UNTREATED CONTROL
NC-08
13.0
-
 73
-
4.3
-
NC-09
10.0
-
158
-
230
-
NC-10
10.8
-
 85
-
7.7
-
NC-11
10.8
-
 88
-
1.5
-
NC-12
12.3
-
 38
-
0.5
-
NC-13
 9.6
-
 79
-
2.2
-
GA-07
11.5
-
 27
-
2.0
-
GA-08
 6.4
-
 18
-
0.9
-
Mean
10.6
-
70.8
-
3.1
-
  1. a   Total suppression (no trees attacked beyond treated buffer during 6-week post-treatment period).
    b   Partial suppression (trees attacked beyond treated buffer, infestation growth decreased by > 50%).
    c   No suppression (trees attacked beyond treated buffer, infestation growth decreased by < 50%).


  2. Mean values were calculated by summing % reduction for each infestation and dividing by the number of infestations.