Pheromone-mediated mass trapping and population diversion as strategies for suppressing Carpophilus spp. (Coleoptera: Nitidulidae) in Australian stone fruit orchards

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Abstract:

Summary

1 Five experiments were conducted during 1995–99 in stone fruit orchards on the Central Coast and in inland New South Wales, Australia, on the use of synthetic aggregation pheromones and a coattractant to suppress populations of the ripening fruit pests Carpophilus spp. (Coleoptera: Nitidulidae).

2 Perimeter-based suppression traps baited with pheromone and coattractant placed at 3 m intervals around small fruit blocks, caught large numbers of Carpophilus spp. Very small populations of Carpophilus spp. occurred within blocks, and fruit damage was minimal.

3 Carpophilus spp. populations in stone fruit blocks 15–370 m from suppression traps were also small and non-damaging, indicating a large zone of pheromone attractivity.

4 Pheromone/coattractant-baited suppression traps appeared to divert Carpophilus spp. from nearby (130 m) ripening stone fruit. Ten metal drums containing decomposing fruit, baited with pheromone and treated with insecticide, attracted Carpophilus spp. and appeared to reduce populations and damage to ripening fruit at distances of 200–500 m. Populations and damage were significantly greater within 200 m of the drums and may have been caused by ineffective poisoning or poor quality/overcrowding of fruit resources in the drums.

5 Suppression of Carpophilus spp. populations using synthetic aggregation pheromones and a coattractant appears to be a realistic management option in stone fruit orchards. Pheromone-mediated diversion of beetle populations from ripening fruit may be more practical than perimeter trapping, but more research is needed on the effective range of Carpophilus pheromones and the relative merits of trapping compared to attraction to insecticide-treated areas.

Keywords: Aggregation pheromones; Carpophilus spp. coattractant; mass trapping; population diversion; stone fruit; suppression

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1461-9563.2001.00086.x

Affiliations: 1: Irrigated Agriculture Research and Extension Center, Washington State University, 24106 North Bunn Road, Prosser, Washington 99350, U.S.A, 2: Yanco Agricultural Institute, New South Wales Agriculture, PMB Yanco, New South Wales 2703, Australia, 3: USDA Agricultural Research Service, National Center for Agricultural Utilization Research, Bioactive Agents Research Unit 1815 North University Street, Peoria, Illinois 61604, U.S.A., 4: Queensland Department of Primary Industries, Animal Research Institute, Locked Bag no. 4, Moorooka, Queensland 4105, Australia

Publication date: February 1, 2001

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