Wood production has a large socioeconomic role in Sweden and will also be important for the sequestration of carbon from the atmosphere in the future. Seed orchards serve an important role for the production of high-quality seeds and thus in the generation of new forests. However, insects are chronic pests and cause great losses in seed production.
This project aims at identifying the sex pheromones of the three major moth pests to be used for monitoring of their phenology, dispersal and population density in orchards. The potential for pheromone-mediated mating disruption will also be investigated.
The three species involved are Dioryctria abietella and Cydia strobilella, for which we have identified the pheromones (see publications), and Eupithecia abietaria.
Monitoring baits have been tested in the Nordic countries and the rest of Europe to optimize protocols for moth monitoring in seed orchards by use of attractive traps. Orchard managers should be able to use the traps without species identification problems. The research results will serve as basis for an IPM program. Training courses will be offered to the orchard managers. Pheromones for monitoring and mating disruption will be made commercially available.
The pheromone investigations have been complemented by studies on the role of plant volatiles and colours for oviposition in the moth species.
With Olle Anderbrant and Christer Löfstedt. (Reporter, photographer and editor: Bernard Mikulic, SVT)
Picture: Spruce seed orchard at Maglehem, Scania. Photo: Erling Jirle
Picture: Norway Spruce cones heavily attacked by Spruce Coneworm, Dioryctria abietella. Photo: Erling Jirle.