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J Med Entomol

Title:		Laboratory evaluation techniques to investigate the spatial potential of repellents for push and pull mosquito control systems
Author(s):		Obermayr U; Ruther J; Bernier U; Rose A; Geier M;
Address:		"Biogents AG, Universitaet Regensburg, Universitaetsstrasse 31, D-93053 Regensburg, Germany. ulla.obermayr@biogents.com"
Journal Title:		J Med Entomol
Year:		2012
Volume:		49
Issue:		6
Page Number:		1387 - 1397
DOI:		10.1603/me12084
ISSN/ISBN:		0022-2585 (Print) 0022-2585 (Linking)
Abstract:		"A protocol has been developed for the indoor evaluation of candidate spatial repellents intended for use in push and pull systems. Single treatments (catnip oil, 1-methylpiperazine, and homopiperazine) and a mixture of catnip oil and homopiperazine were tested with yellow-fever mosquitoes (Aedes aegypti) in Y-tube olfactometers to determine 1) if these compounds inhibited mosquito host-seeking at short distances and 2) if results obtained in olfactometer tests can be correlated with a larger scale set-up, that is, a room test. All test materials significantly decreased the ability of mosquitoes to find host odors (from a human finger) by up to 96.7% (2.5% catnip and homopiperazine mix). Similar effects could be observed within a new room test set-up, which involved a repellent dispensing system and an attractive trap (BG-Sentinel). Mosquitoes captured by the BGS trap had to fly through a treatment-containing air curtain created by the dispensing system. Compared with the use of a control (ethanol solvent without candidate repellent), trap catch rates were significantly reduced when 5% catnip, 5% 1-methylpiperazine, and 5% homopiperazine were dispensed. Homopiperazine produced the greatest level of host-seeking inhibition with a 95% reduction in the trap catches. The experimental set-up was modified to test the viability of those technologies in a simple push & pull situation.. The combination of BGS trap and a 10% mix of catnip and homopiperazine helped to reduce human landing rates by up to 44.2% with a volunteer sitting behind the air curtain and the trap running in front of the curtain"
Keywords:		Aedes Animals Evaluation Studies as Topic Female Humans *Insect Repellents *Mosquito Control *Pheromones Research Design Smell;
Notes:		"MedlineObermayr, U Ruther, J Bernier, U Rose, A Geier, M eng Comparative Study Evaluation Study England 2012/12/29 J Med Entomol. 2012 Nov; 49(6):1387-97. doi: 10.1603/me12084"