Table 1. Catch of forest insects attracted to window traps baited with ethanol (800 mg/day) or unbaited at breast height on Scots pine trees (April 28 - May 12, 1986). | ||||||
Percentage of traps catchingb | ||||||
---|---|---|---|---|---|---|
Speciesa | Males | Females | Total | Baited traps | Unbaited traps | P value chi square |
H. palliatus | 27 | 21 | 48 | 37 | 1.5 | < 0.001 |
T. domesticum | 26 | 24 | 50 | 55 | 0 | < 0.001 |
T. piniperda | 3 | 2 | 5 | 6 | 0 | 0.04 |
R. ferrugineus | - | - | 82 | 46 | 0 | < 0.001 |
Pollenia spp. | 14 | 4 | 18 | 20 | 0 | < 0.001 |
Table 2. Catch of various forest Coleoptera attracted to window traps baited with different relative rates of ethanol (1.0 rate equivalent to 800 mg/day) at breast height on Scots pine trees (April 24 - May 6, 1987, Sjöbo, Sweden). | ||||||
Catch | ||||||
---|---|---|---|---|---|---|
Speciesa | Male | Female | Male proportion | 95 % BCL | Catch range | Percent of traps catchingb |
Blanks | ||||||
H. palliatus | 1 | 3 | 0.25 | 0.05 - 0.07 | 0 - 2 | 4.5 |
T. domesticum | 0 | 0 | 0 | |||
T. piniperda | 2 | 1 | 0.67 | 0.21 - 0.94 | 0 - 1 | 4.5 |
R. ferrugineus | 0 | 0 | 0 | |||
0.01 Ethanol | ||||||
H. palliatus | 35 | 40 | 0.47 | 0.36 - 0.58 | 0 - 6 | 51.5a |
T. domesticum | 9 | 7 | 0.56 | 0.33 - 0.77 | 0 - 1 | 24.2a |
T. piniperda | 0 | 2 | 0 - 1 | 3 | ||
R. ferrugineus | (6)c | (6) | 0 - 2 | 12.1a | ||
0.1 Ethanol | ||||||
H. palliatus | 102 | 94 | 0.52 | 0.45 - 0.59 | 0 - 23 | 65.2a |
T. domesticum | 26 | 26 | 0.50 | 0.37 - 0.63 | 0 - 5 | 47ab |
T. piniperda | 8 | 20 | 0.29 | 0.15 - 0.47 | 0 - 7 | 19.7ab |
R. ferrugineus | (44.5)c | (44.5) | 0 - 9 | 54.5ab | ||
1.0 Ethanol | ||||||
H. palliatus | 218 | 193 | 0.53 | 0.48 - 0.58 | 0 - 61 | 83.3abc |
T. domesticum | 44 | 61 | 0.42 | 0.33 - 0.51 | 0 - 9 | 75.8abc |
T. piniperda | 13 | 11 | 0.54 | 0.35 - 0.72 | 0 - 4 | 15.2ab |
R. ferrugineus | (145)c | (145) | 0 - 15 | 84.8abc |
Table 3. Catches (male:female) of various forest Coleoptera attracted to pipe traps with funnel and baited with either ethanol (800 mg/day), monoterpenes (see text), or both (April 29 - May 12, 1986, Sjöbo, Sweden). | ||||||
Total catch (male:female) | ||||||
---|---|---|---|---|---|---|
Ethanol | Terpenes | Ethanol + terpenes | ||||
Speciesa | Entering pipe | Funnel | Entering pipe | Funnel | Entering pipe | Funnel |
H. palliatus | 0:2 | 3:7 | 0 | 0 | 24:19 | 21:22 |
T. domesticum | 3:4 | 16:14 | 0 | 0 | 0:1 | 1:1 |
T. piniperda | 0 | 0 | 1:1 | 17:21 | 2:2 | 26:16 |
R. ferrugineus | 0 | 9 | 0 | 1 | 10 | 5 |
G. quadripunctatus | 0 | 6 | 0 | 0 | 0 | 0 |
H. ater | 0 | 1:0 | 0 | 0 | 0 | 5:2 |
H. abietis | 0 | 0 | 0 | 0 | 0 | 4 |
Table 4. Catch of various forest Coleoptera attracted to window traps (back-to-back) baited with ethanol (800 mg/day), (-)-verbenone (0.25 mg/day), or both (April 23 - May 11, 1987, Sjöbo, Sweden). | ||||||
Catch | ||||||
---|---|---|---|---|---|---|
Speciesa | Male | Female | Male proportion | 95 % BCL | Catch range | Percent of traps catchingb |
Ethanol | ||||||
H. palliatus | 46 | 33 | 0.58 | 0.47 - 0.68 | 0 - 9 | 90 |
T. domesticum | 24 | 26 | 0.48 | 0.35 - 0.61 | 0 - 6 | 85 |
R. ferrugineus | (70)c | (70) | 0 - 23 | 90 | ||
M. aeneus | (1)c | (1) | 0 - 1 | 10 | ||
G. quadripunctatus | (3)c | (3) | 0 - 3 | 20 | ||
Ethanol + (-)-verbenone | ||||||
H. palliatus | 64 | 48 | 0.57 | 0.48 - 0.66 | 0 - 22 | 85 |
T. domesticum | 14 | 10 | 0.58 | 0.39 - 0.76 | 0 - 3d | 70 |
R. ferrugineus | (103.5)c | (103.5) | 0 - 38 | 90 | ||
M. aeneus | (11)c | (11) | 0 - 4d | 40 | ||
G. quadripunctatus | (5.5)c | (5.5) | 0 - 3 | 45 | ||
(-)-Verbenone | ||||||
H. palliatus | 1 | 2 | 0.33 | 0.06 - 0.79 | 0 - 1 | 15 |
T. domesticum | 0 | 0 | 0 | 0 | ||
R. ferrugineus | (1)c | (1) | 0 - 1 | 10 | ||
M. aeneus | (5.5)c | (5.5) | 0 - 3 | 20 | ||
G. quadripunctatus | 0 | 0 | 0 | 0 |
JOHN A. BYERS Department of Animal Ecology, Lund University, SE-223 62 Lund, Sweden Present address: |
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