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J Exp Biol

Title:		Breaking a paradigm: male-produced aggregation pheromone for the Colorado potato beetle
Author(s):		Dickens JC; Oliver JE; Hollister B; Davis JC; Klun JA;
Address:		"United States Department of Agriculture, Agricultural Research Service, Plant Sciences Institute, Vegetable Laboratory, Beltsville, MD 20705, USA. dickensj@ba.ars.usda.gov"
Journal Title:		J Exp Biol
Year:		2002
Volume:		205
Issue:		Pt 13
Page Number:		1925 - 1933
DOI:		10.1242/jeb.205.13.1925
ISSN/ISBN:		0022-0949 (Print) 0022-0949 (Linking)
Abstract:		"A male-produced aggregation pheromone was identified for the Colorado potato beetle Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae). While male beetles produced only minor amounts of the pheromone, its production could be enhanced by topical application of juvenile hormone III (JH III) (eightfold), by antennectomy (40-fold) or by the combined treatment of JH III and antennectomy (almost 200-fold); this enhancement enabled the identification of the compound as (S)-3,7-dimethyl-2-oxo-oct-6-ene-1,3-diol [(S)-CPB I], a unique structure for an insect pheromone. Antennal receptors of both sexes responded selectively to the (S)-enantiomer. Both male and female Colorado potato beetles were attracted to serial source loads of (S)-CPB I in laboratory bioassays; (R)-CPB I was inactive or inhibitory, as demonstrated by the inactivity of the racemate. This is the first identification of a pheromone for the Colorado potato beetle and differs from the paradigm of a female-produced pheromone for this insect. The attractant is also the first male-produced pheromone identified for the Chrysomelidae. The discovery that both JH III and antennectomy increase levels of the pheromone (S)-CPB I indicates the existence of a feedback system involving antennal input, and this system may be under hormonal control"
Keywords:		"Animals Behavior, Animal/physiology Coleoptera/anatomy & histology/chemistry/drug effects/*physiology Electrophysiology Female Male Molecular Conformation Molecular Structure Pheromones/*metabolism Sensory Receptor Cells/anatomy & histology/metabolism Ses;"
Notes:		"MedlineDickens, Joseph C Oliver, James E Hollister, Benedict Davis, John C Klun, Jerome A eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2002/06/22 J Exp Biol. 2002 Jul; 205(Pt 13):1925-33. doi: 10.1242/jeb.205.13.1925"