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Development of mating disruption for control of pine sawfly populations
- Anderbrant, Olle, Löfqvist, Jan, Högberg, Hans-Erik, Hedenström, Erik
- Entomologia experimentalis et applicata 1995 v.74 no.1 pp. 83-90
- Neodiprion sertifer, acetates, cotton, dispensers, isomers, males, mating disruption, plantations, population density, sawflies, sex pheromones, sex ratio
- Mating disruption of the pine sawfly Neodiprion sertifer (Geoffroy) (Hymenoptera: Diprionidae) was strongly indicated by reduced male trap catches in pine plantations permeated with the sex pheromone, (2S, 3S, 7S)-diprionyl acetate. The trap catch reduction was 95 to near 100% when dispensers every 10 m were used, giving a total release of about 3 mg per hectare and day. Two mg of pheromone per cotton roll dispenser maintained low catches for the whole season (about 2 months) without any renewal of disruption dispensers. An erythro-mixture was as effective as the pure pheromone isomer. The effects of the experiments on population density and sex ratio were not possible to investigate, due to a general collapse of the population, also outside experimental plots, the year after the experiments.