Department of Crop Science Swedish University of Agricultural Sciences SE 230-53 Alnarp, Sweden |
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Table 1. Trap ring radii and number of synthetic pheromone-baited traps per concentric ring in previous studies in which Ips typographus were released at the center of the rings and a portion recaptured on the pheromone traps. | |||||
Duelli et al. (1997) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
---|---|---|---|---|---|
Ring radius (m) | 5 | 200 | 500 | ||
Number traps | 4 | 80 | 80 | ||
Catch unflown (6898)^{a} | 2445 | 650 | 195 | ||
Catch flown (5123) | 2070 | 95 | 38 | ||
Zolubas and Byers (1995) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Ring radius (m) | 10 or 30^{b} | 60 | 90 | 120 | |
Number traps | 1 or 4^{b} | 4 | 4 | 4 | |
Catch (5030 or 5920)^{b} | 284 or 384^{b} | 208 | 64 | 7 | |
Zumr (1992) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Ring radius (m) | 50 | 100 | 200 | 300 | 400 |
Number traps | 4 | 4 | 4 | 4 | 4 |
Catch (6600)^{c} | 2673 | 1254 | 719 | 317 | 290 |
Botterweg (1982) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Ring radius (m) | 50 | 100 | 200 | 350 | 500 |
Number traps | 4 | 8 | 16 | 28 | 40 |
Catch (1500 and 7000)^{d} | 125 or 198^{d} | 56 or 36 | 55 or 66 | 22 or 90 | 9 or 167 |
Table 2. Percentages of recaptured Ips typographus in previous studies compared with predicted percentages calculated from the filtering model with an effective attraction radius (EAR) of pheromone traps best fitting the observed percentage for trap ring 1. | |||||
Percentage recaptured | |||||
Duelli et al. (1997) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Catch unflown (6898) | 35.45 | 9.42 | 2.83 | ||
Predicted (1.39 m EAR) | 35.45 | 9.42 | 2.83 | ||
Catch flown (5123) | 40.41 | 1.85 | 0.74 | ||
Predicted (1.59 m EAR) | 40.41 | 12.04 | 3.84 | ||
Zolubas and Byers (1995) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Catch (5030 or 5920)^{a} | 5.65 or 6.49^{a} | 3.51 | 1.08 | 0.12 | |
Predicted (1.78 or 1.53 m EAR)^{a} | 5.65 or 6.49^{a} | 3.03 | 1.96 | 1.44 | |
Zumr (1992) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Catch (6600) | 40.5 | 19.0 | 10.89 | 4.8 | 4.39 |
Predicted (15.9 m) | 40.5 | 12.05 | 4.8 | 2.88 | 2.01 |
Botterweg (1982) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Catch (1500 or 7000)^{b} | 8.33 or 2.83^{b} | 3.73 or 0.51 | 3.67 or 0.94 | 1.47 or 1.29 | 0.6 or 2.39 |
Predicted (3.27 or 1.11 m EAR)^{b} | 8.33 or 2.83^{b} | 7.64 or 2.75 | 7.0 or 2.67 | 6.42 or 2.6 | 5.88 or 2.52 |
Table 3. Estimated effective attraction radii of synthetic pheromone traps for each concentric trap ring of previous studies in order to obtain the observed catches of Ips typographus with the filtering model. | |||||
Effective attraction radius (EAR) in m | |||||
Duelli et al. (1997) | Ring 1 | Ring 2 | Ring 3 | Ring 4 | Ring 5 |
Unflown | 1.39 | 1.15 | 1.01 | - | - |
Flown | 1.59 | 0.24 | 0.25 | - | - |
Zolubas and Byers (1995) | |||||
Experiment 1 or 2^{a} | 1.78 or 1.53^{a} | 1.77 | 0.85 | 0.12 | - |
Zumr (1992) | |||||
pooled release | 15.9 | 25.1 | 42.3 | 38.2 | 55.7 |
Botterweg (1982) | |||||
Experiment 1 or 3^{b} | 3.27 or 1.11^{b} | 1.6 or 0.21 | 1.64 or 0.38 | 0.68 or 0.53 | 0.28 or 0.99 |
Table 4. Estimated effective attraction radii (EAR in m) of traps with natural pheromone of Ips paraconfusus (75 males in logs) for nine experiments of various trap ring radius in order to obtain the observed catches (Gara, 1963). | ||||
Emerging beetles | Responding beetles | |||
Ring radius (m)^{a} | Recapture % | EAR (95% C.L.)^{b} | Recapture % | EAR (95% C.L.) |
3 | 18.58 | 0.35(0.31-0.40) | 19.05 | 0.36(0.32-0.41) |
5 | 28.18 | 0.89(0.80-0.97) | 26.73 | 0.84(0.77-0.92) |
10 | 20.62 | 1.30(1.14-1.47) | 25.92 | 1.63(1.35-1.95) |
25 | 15.74 | 2.47(2.22-2.74) | 16.96 | 2.66(2.44-2.91) |
50 | 5.97 | 1.88(1.31-2.67) | 16.39 | 5.15(4.45-5.93) |
100 | 2.31 | 1.45(0.57-3.64) | 11.89 | 7.47(5.22-10.52) |
500 | 1.45 | 4.56(2.20-9.27) | 10.98 | 34.49(29.72-39.93) |
1000 | 0.70 | 4.40(1.19-15.71) | 1.27 | 7.98(4.21-15.08) |
2000 | 0 | - | 0.13 | 1.68(0.25-9.30) |
Table 5. Estimated effective attraction radii of lineatin-baited traps for each concentric trap ring in order to obtain the observed catches of Trypodendron lineatum with the filtering model (Salom and McLean, 1989). | |||
Effective attraction radius (EAR) in m | |||
Ring 1 | Ring 2 | Ring 3 | |
Experiment 1^{a} | 0.32(0.30-0.34)^{b} | 1.04(0.98-1.10) | 1.72(1.61-1.84) |
Experiment 2^{c} | 2.43(2.29-2.59) | - | - |
Experiment 3^{d} | 7.07(5.11-9.74) | - | - |