Table 1. Attraction of flying Tomicus piniperda to traps releasing volatiles from Scots pine logs (28 cm x 13 cm diam.) or from glass tubes containing pine monoterpenes (each > 99 percent and released at about 30 mg/day at 18oC) in Scots pine plantations of southern Sweden | |||
Catch on traps) | |||
---|---|---|---|
Trap contentsa | Male | Female | Totalb |
March-April 1982 (22 replicates each treatment) | |||
Blank control | 21 | 31 | 52c |
Log | 309 | 314 | 623d |
Log + 30 females | 325 | 315 | 640 |
Log + 30 males | 319 | 313 | 632 |
Log + 30 females + 30 males | 379 | 395 | 774 |
April-May 1983 (17 replicates each treatment) | |||
Blank control | 5 | 2 | 7e |
A = (+)-3-Carene | 23 | 25 | 48 |
B = (+)-alpha-Pinene | 29 | 31 | 60 |
C = (-)-alpha-Pinene | 38 | 41 | 79 |
D = Terpinolene | 57 | 47 | 104 |
A + B | 24 | 29 | 53 |
B + C | 54 | 53 | 107 |
A + B + D | 107 | 96 | 203f |
Log | 127 | 129 | 256 |
Table 2. Attraction response of walking male and female Tomicus piniperda to monoterpenes occurring in Scots pine (28 April-8 May 1983). Monoterpenes were diluted in diethyl ether and released from 5 µl capillary tubes in a laminar air flow in a laboratory olfactometer [3] under dim red light at 8 lux | |||
Percent responding - males/females | |||
---|---|---|---|
Amounts released ( x 2.2 g compound/min) | |||
Test solution | 10-7 | 10-6 | 10-5 |
(+)-3-Carene | 23/17 | 40a/47a | 50a/40a |
(+)-alpha-Pinene | 20/23 | 33a/53a | 47a/47a |
(-)-alpha-Pinene | 23/30a | 50a/37a | 50a/47a |
Terpinolene | 27a/30a | 53a/57a | 53a/60a |
Myrcene | 10/17 | 10/7 | 10/17 |
Ether control | 10/13 | 3/7 | 10/10 |
J. A. BYERS1, B. S. LANNE2, J. LÖFQVIST1, F. SCHLYTER1 and G. BERGSTRÖM2 1Department of Animal Ecology, Lund University, SE-223 62 Lund, Sweden Present address: 2Chemical Ecology, Göteborg University, SE-405 30 Göteborg, Sweden |
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