Engineering Roach Killers-Presentation

Engineering Roach Killers-Presentation - Scent of a Woman:...

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Unformatted text preview: Scent of a Woman: Application of Cockroach Pheromone as Bait Doug Beshara Anthony Williams May 1, 2007 Objectives • Investigate the feasibility of using the pheromone blattellaquinone to increase the effectiveness of roach bait products – Population model that describes how roaches proliferate in an environment to be targeted by roach bait – Necessities for industrial scale pheromone and gel synthesis – Utility functions that represent anticipated consumer satisfaction with a given product • Roaches are a major source of home infestations. – The German cockroach ( Blattella germanica ) is the most abundant out of 4000 species – American cockroach ( Periplaneta americana ) – Asian cockroach ( Blattella asahinai ) American Roach 1 inch long Asian Roach ½-5/8 inch long German Roach ½-5/8 inch long The Roach Problem • Roaches feast on garbage, feces – Carry at least 100 species of bacteria • Salmonella, E. coli, Shigella , etc. – Carrier of house dust mites • Powerful allergen House dust mite Salmonella bacterium The Roach Problem • Can go for a month without food and can hold its breath for 45 minutes • Nocturnal creatures • Have an amazing reproductive capacity – One cockroach can produce up to 300,000 roaches per year – From babies to adults in 3-4 months Why won’t they just die?? • Clean out – Residual Pesticides – Crack and Crevice work (C&C) – Foggers/Aerosols • Roach Bait – Bait stations (indoor) – Bait gels (indoor) – Granular baits (outdoor) – Insect Growth Regulators (IGR) – Pheromone traps Methods of Extermination Roach Poisons Boric acid powder is applied to infested areas. The particles cling to the insects’ legs and cause fatal chemical burns. Pyrethroid nerve poisons are a common class of insecticides used to kill roaches. Fipronil is fatal after about 72 hours allowing the poison to spread throughout the roach population. • Research project at Cornell University – Nojima, Schal, Webster, Santangelo, Roelofs • German roach pheromone isolated using various techniques – Gas-chromatographic electroantennogram detector (GC-EAD) – Silica gel separation – NMR Characterization – High Performance liquid Chromatography (HPLC) – GC-mass spectrometry Electroantennogram Isolation of New Pheromone • Same as natural pheromone – Supported by NMR • Roaches very responsive – Lab tested • 10-100ng attracted 60% of males in lab – Field tested • Roach-infested pig farm • 10-1000 μ g trapped 10-30 roaches per night • Very promising as an attractant Blattellaquinone Roach Trap Market • Competitors – Maxforce (Bait Stations, Bait Gels, Granular Baits) – Avert (Aerosol Bait) – Siege (Aerosol Bait) – Niban (Granular Bait) – Baygon (Granular Bait) • Area of Focus – Southwest U.S. Roach Trap Design Aerosol forms don’t get the roaches where they are hiding Granular forms can’t be eaten by the roach nymphs Bait stations have to be placed very carefully or they...
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This note was uploaded on 08/31/2011 for the course CHE 4273 taught by Professor Staff during the Spring '10 term at Oklahoma State.

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Engineering Roach Killers-Presentation - Scent of a Woman:...

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