Pest Management Science (2017) 73, 223-231

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Sandra Vacas, Ourania Melita, Antonios Michaelakis, Panagiotis Milonas, Roxana Minuz, Paola Riolo, Mohamed Kamal Abbass, Paolo Lo Bue, Stefano Colazza, Ezio Peri, Victoria Soroker, Yaara Livne, Jaime Primo and Vicente Navarro-Llopis (2017)
Lures for red palm weevil trapping systems: aggregation pheromone and synthetic kairomone
Pest Management Science 73 (1), 223-231
The optimisation of the lure is essential for the implementation of trapping systems to control insect pests. In this work, the response of the red palm weevil (RPW), Rhynchophorus ferrugineus Olivier, to increasing emission rates of its aggregation pheromone (ferrugineol) and the efficacy of a convenient synthetic kairomone based on fermentation odours (ethyl acetate and ethanol) have been evaluated in different years and locations along the Mediterranean basin.
In general, although capture data and emission had noticeable variability among locations, significantly fewer RPW were captured in pyramidal Picusan® traps with the lowest ferrugineol emission rates tested (0.6–3.8 mg day-1). Captures increased rapidly with ferrugineol emission up to 4–5 mg day-1; then, higher emission rates did not improve or reduce captures, up to the highest emission rate tested of 50.9 mg day-1. Thus, there is no evidence of an optimum release rate corresponding to a maximum of RPW catches. Traps baited with the synthetic kairomone (1:3 ethyl acetate/ethanol) captured 1.4–2.2 times more total weevils than traps baited only with ferrugineol. Moreover, in most of the locations, the synthetic blend was at least as effective as the local coattractants used (plant material + molasses).
Ferrugineol emission rate can vary in a wide range without significantly affecting RPW response. Coattractants based on fermenting compounds, ethyl acetate and ethanol, are able to improve the attractant level of ferrugineol and could be employed to replace non-standardised natural kairomones in RPW trapping systems after further optimisation of their proportions and doses.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Link to article at publishers website
Database assignments for author(s): Sandra Vacas, Victoria Soroker, Panagiotis G. Milonas, Vicente Navarro-Llopis, Antonios Michaelakis, Stefano Colazza, Paola Riolo

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Rhynchophorus ferrugineus