| Title: | A pheromone analogue affects the evaporation rate of (+)-disparlure in Lymantria dispar |
| Author(s): | Sollai G; Murgia S; Secci F; Frongia A; Cerboneschi A; Masala C; Liscia A; Crnjar R; Solari P; |
| Address: | "Department of Biomedical Sciences, Section of Physiology, University of Cagliari, Monserrato, Cagliari, Italy" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: The gypsy moth Lymantria dispar L. is a widespread pest that causes economic damage to cork oak forests. Females produce the sex pheromone (+)-(7R,8S)-epoxy-2-methyloctadecane, known as (+)-disparlure [(+)D], for long-distance attraction of conspecific males. A (+)D analogue, 2-decyl-1-oxaspiro[2.2]pentane (OXP-01), neither stimulating nor attractive by itself, causes short-time inhibition of male response in a 1:1 blend with (+)D. The authors investigated whether and how the biological activity of the natural pheromone is affected by OXP-01 on a long-time basis (up to 16 days), also by looking at possible physicochemical reciprocal interactions. RESULTS: Blending of (+)D with OXP-01 decreased, under low evaporation rate, the pheromone effectiveness, as assessed by electroantennogram recordings. In male trappings, within the first 24 h, OXP-01 decreased and later enhanced the blend attractiveness, but only under high evaporation rate. Gas chromatography-mass spectroscopy indicates that quantitative retrieval of (+)D from blend cartridges is higher than for pure pheromone, and nuclear magnetic resonance measurements show that OXP-01 produces, possibly by Van der Waals interactions, a bimolecular entity with pheromone causing retention and lengthening of its attractiveness over time. CONCLUSION: The biological and physicochemical interactions between (+)D and OXP-01 may provide valuable information for the optimisation of pheromone-based control strategies for gypsy moths" |
| Keywords: | "Alkanes/*chemistry/pharmacology Animals Arthropod Antennae/physiology Behavior, Animal Electrophysiology Epoxy Compounds/*chemistry/pharmacology Italy Male Moths/physiology Sex Attractants/*chemistry/pharmacology Spiro Compounds/*chemistry/pharmacology be;" |
| Notes: | "MedlineSollai, Giorgia Murgia, Sergio Secci, Francesco Frongia, Angelo Cerboneschi, Anna Masala, Carla Liscia, Anna Crnjar, Roberto Solari, Paolo eng Research Support, Non-U.S. Gov't England 2013/07/23 Pest Manag Sci. 2014 Apr; 70(4):674-81. doi: 10.1002/ps.3609. Epub 2013 Aug 9" |
