Determination of release rates of pheromone dispensers by air sampling with C-18 bonded silica

Pop, Lucian Cristian; Arn, H.; Buser, Hans-Rudolf

doi:10.1007/bf00980687

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…Dynamic gas flow-through systems have previously been used to collect pheromone vapors using an array of different adsorbents that include C18 ( − ), silica (20, 21 ), Super-Q (), Tenax ( , ), Porapak-Q ( − ), and activated charcoal (). The above methods rely on trapping the gas-phase constituents onto the adsorbent bed followed by solvent extraction and analysis of the concentrated solvent extract either by sampling the headspace or solvent by GC.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Pheromone Release from Commercial Mating Disruption Dispensers

Tomaszewska

Hebert

Brunner

et al. 2005

J. Agric. Food Chem.

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Pome fruit growers and crop consultants have expressed concerns about the seasonal release performance of commercial codling moth mating disruption dispenser products. Because of these concerns, we developed a laboratory flow-through volatile collection system (VCS) for measuring the volatile release of the codling moth sex pheromone, codlemone, from commercially available hand-applied dispensers. Under controlled air-flow and temperature conditions, the released vapor was trapped onto a polyurethane foam adsorbent followed by solvent extraction, solvent reduction, and GC/MS determination. Method recovery and breakthrough validations were performed to demonstrate system reliability before determining codlemone release from commercial dispensers field-aged over 140 days. The volatile collection was carried out in a consistent manner among five dispenser types most commonly used by growers, so that direct comparison of performance could be made. The comparison showed differences in the amount of pheromone released and in the patterns of release throughout the season between dispenser types. The variation in release performance demonstrates the need for routine evaluation of commercially marketed mating disruption dispensers. We believe that the simple and cost-effective volatile collection system can assist pheromone dispenser manufacturers in determining seasonal dispenser performance before new products are introduced into the commercial market and in rapidly verifying dispenser release when field-aged dispenser efficacy is in question.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Pheromone Release from Commercial Mating Disruption Dispensers

Tomaszewska

Hebert

Brunner

et al. 2005

J. Agric. Food Chem.

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“…2005), total organic solvent extractions of dispensers to determine residual pheromone load after field ageing (Critchley et al. 1997) or flow‐through non‐destructive collection of the pheromone vapour (Pop et al. 1993; Bengtsson et al.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of trimedlure dispensers by a method based on thermal desorption coupled with gas chromatography–mass spectrometry

Alfaro

Domínguez

Navarro‐Llopis

et al. 2008

J Applied Entomology

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Knowledge about the behaviour of trimedlure (TML) dispensers is essential to ensure the efficacy of monitoring and control methods based on TML as attractant. There are several commercially available TML dispensers, and each of them has a different useful life and TML release profile. Their emission is also affected differently by environmental factors. Even the same type of dispenser sometimes shows an important variability in the TML release rate. Because of the importance of methods based on TML lures in the control of the Mediterranean fruit fly and the influence of the TML dispenser on the efficacy of these control methods, we developed a non‐destructive flow‐through system to measure the TML release rate. This volatile collection method (VCM) adsorbs TML vapour on a Tenax TA desorption tube, and TML is quantified by Thermal desorption coupled with gas chromatography/mass spectrometry. Two types of TML dispensers, a polymeric (Aralure) and a mesoporous (Epalure), were field aged during 3 months. The TML release rates of these dispensers were determined by both, VCM and solvent extraction method. In this study, the correlation between both measurement methods is shown. A field trial has also been carried out to correlate trap catches and TML emission of each type of tested dispenser. The VCM allows a quick and accurate evaluation of the current behaviour of commercial dispensers along their useful life. It also allows comparing the TML release rate between different dispensers. We believe that the VCM can be useful for dispenser manufacturers to determine seasonal dispenser performance before a new product is introduced in the market, and to rapidly verify TML dispenser release when field‐aged dispenser efficacy is in question. Thus, it can be employed as a quality control of commercial dispensers.

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