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Pheromone mating disruption of the pine sawfly Neodiprion sertifer : is the size of the treated area important?

Anderbrant, Olle LU ; Hedenström, Erik and Högberg, Hans-Erik (2002) In IOBC/WPRS Bulletin 25(9). p.111-116
Abstract
Few attempts to control forest insects by means of pheromone mating disruption have

been reported. The first such experiments with the European pine sawfly, Neodiprion sertifer

(Hymenoptera: Diprionidae), resulted in nearly complete trap catch reduction, but no effects on

population density or sex ratio were noted. Unmated females lay eggs, which develop into males

only. Therefore, if mating disruption would be successful, a more male-biased sex ratio is

expected the next generation. One possible explanation for the early results is that mated females

disperse into the treated area, and thus obscure the effects of the treatment. In order to reduce the

effect of such immigrating... (More)
Few attempts to control forest insects by means of pheromone mating disruption have

been reported. The first such experiments with the European pine sawfly, Neodiprion sertifer

(Hymenoptera: Diprionidae), resulted in nearly complete trap catch reduction, but no effects on

population density or sex ratio were noted. Unmated females lay eggs, which develop into males

only. Therefore, if mating disruption would be successful, a more male-biased sex ratio is

expected the next generation. One possible explanation for the early results is that mated females

disperse into the treated area, and thus obscure the effects of the treatment. In order to reduce the

effect of such immigrating females, the treated area was increased in the experiment described

here from the earlier used 0.5 – 4 ha to 25 ha. The acetate of erythro-3,7-dimethyl-2-

pentadecanol was used for disruption and released from dispensers every 10 m. The influence on

male orientation was monitored by pheromone traps, baited with the acetate of (2S,3S,7S)-3,7-

dimethyl-2-pentadeanol and placed at 100 m interval along two perpendicular, 1500 m lines

intersecting the treated area. The trap catch reduction was near 100% during the first month, but

then declined to around 90% during the second month. Mating frequencies were checked by

comparing the sex ratio of the next generation from within and outside the treatment area. No

effect of the treatment on the sex ratio was detected, and the frequency of mated females could be

assumed to be independent of treatment. Alternative hypotheses to explain the failure of

pheromone mating disruption in N. sertifer are discussed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IOBC/WPRS Bulletin
volume
25
issue
9
pages
111 - 116
publisher
Monfavet
ISSN
1027-3115
project
Chemical communication in sawflies
language
English
LU publication?
yes
id
e1e1c1a5-1483-4f7d-a643-d424f71dcf3b (old id 149716)
alternative location
http://phero.net/iobc/samos/bulletin/anderbrant.pdf
date added to LUP
2007-06-26 16:25:07
date last changed
2016-04-16 03:44:47
@article{e1e1c1a5-1483-4f7d-a643-d424f71dcf3b,
  abstract     = {Few attempts to control forest insects by means of pheromone mating disruption have<br/><br>
been reported. The first such experiments with the European pine sawfly, Neodiprion sertifer<br/><br>
(Hymenoptera: Diprionidae), resulted in nearly complete trap catch reduction, but no effects on<br/><br>
population density or sex ratio were noted. Unmated females lay eggs, which develop into males<br/><br>
only. Therefore, if mating disruption would be successful, a more male-biased sex ratio is<br/><br>
expected the next generation. One possible explanation for the early results is that mated females<br/><br>
disperse into the treated area, and thus obscure the effects of the treatment. In order to reduce the<br/><br>
effect of such immigrating females, the treated area was increased in the experiment described<br/><br>
here from the earlier used 0.5 – 4 ha to 25 ha. The acetate of erythro-3,7-dimethyl-2-<br/><br>
pentadecanol was used for disruption and released from dispensers every 10 m. The influence on<br/><br>
male orientation was monitored by pheromone traps, baited with the acetate of (2S,3S,7S)-3,7-<br/><br>
dimethyl-2-pentadeanol and placed at 100 m interval along two perpendicular, 1500 m lines<br/><br>
intersecting the treated area. The trap catch reduction was near 100% during the first month, but<br/><br>
then declined to around 90% during the second month. Mating frequencies were checked by<br/><br>
comparing the sex ratio of the next generation from within and outside the treatment area. No<br/><br>
effect of the treatment on the sex ratio was detected, and the frequency of mated females could be<br/><br>
assumed to be independent of treatment. Alternative hypotheses to explain the failure of<br/><br>
pheromone mating disruption in N. sertifer are discussed.},
  author       = {Anderbrant, Olle and Hedenström, Erik and Högberg, Hans-Erik},
  issn         = {1027-3115},
  language     = {eng},
  number       = {9},
  pages        = {111--116},
  publisher    = {Monfavet},
  series       = {IOBC/WPRS Bulletin},
  title        = {Pheromone mating disruption of the pine sawfly <i>Neodiprion sertifer</i> : is the size of the treated area important?},
  volume       = {25},
  year         = {2002},
}