Entomologia Experimentalis et Applicata (2011) 139, 250-257

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Sandra Vacas, Cristina Alfaro, Manuel Zarzo, Vicente Navarro-Llopis and Jaime Primo (2011)
Effect of sex pheromone emission on the attraction of Lobesia botrana
Entomologia Experimentalis et Applicata 139 (3), 250-257
Abstract: Since the discovery of Lobesia botrana Denis and Schiffermüller (Lepidoptera: Tortricidae) sex pheromone, it has played an important role in the control and detection of this pest, for example, through the use of pheromone-baited traps and mating disruption techniques. Rubber septa are the most common pheromone dispensers used in monitoring traps, but often dispenser performance is not optimized. The key to improve methods based on pheromones as attractants (monitoring, mass trapping, or 'attract and kill') is to know the optimum emission interval, because release rates can strongly affect the attraction. In this work, five levels of pheromone load with different release rates were compared in traps using mesoporous pheromone dispensers to investigate the optimum release rate maximizing L. botrana catches. Residual pheromone loads of the dispensers were extracted and quantified by gas chromatography, to study release profiles and to estimate the various emission levels. The efficacy of pheromone emission was measured in field trials as number of moths caught. A quadratic model was fitted to relate the numbers caught vs. the daily emission rates. The resulting quadratic term was statistically significant, confirming the existence of a relative maximum for L. botrana catches. Taking into account that the trial was carried out only in one location, an optimum emission value of ca. 400 μg per day could be considered to enhance the attraction of L. botrana under West-Mediterranean weather conditions.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Sandra Vacas, Vicente Navarro-Llopis, Cristina Alfaro

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Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Lobesia botrana Spain (continental)