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J Econ Entomol

Title:		Field trials of aggregation pheromones for the stink bugs Chlorochroa uhleri and Chlorochroa sayi (Hemiptera: Pentatomidae)
Author(s):		Millar JG; McBrien HM; McElfresh JS;
Address:		"Department of Entomology, University of California, Riverside, CA 92521, USA. jocelyn.millar@ucr.edu"
Journal Title:		J Econ Entomol
Year:		2010
Volume:		103
Issue:		5
Page Number:		1603 - 1612
DOI:		10.1603/ec10095
ISSN/ISBN:		0022-0493 (Print) 0022-0493 (Linking)
Abstract:		"In field trials, adult Chlorochroa uhleri (Stal) (Heteroptera: Pentatomidae) of both sexes were caught in significant numbers in cylindrical screen traps baited with gray rubber septum lures loaded with the main component of the male-produced pheromone, methyl (E)-6-2,3-dihydrofarnesoate. Addition of the two possible minor components of the pheromone, methyl (E)-5-2,6,10-trimethyl-5,9-undecadienoate and methyl (2E,6E)-farnesoate, did not affect attraction. Combining the pheromone with different concentrations of volatiles mimicking the odors of a known host plant, alfalfa (Medicago sativa L.), had no significant effect on attraction of adult bugs, whereas combining the pheromone with the pheromones of two sympatric stink bug species, Chlorochroa sayi (Stal) and Euschistus conspersus Uhler, decreased trap captures, suggesting interference between the pheromones. Small numbers of Chlorochroa ligata (Say) adults also were attracted, but numbers caught were too low to allow statistical comparisons between lure blends. In field trials with C. sayi, all three of the male-specific pheromone compounds [methyl geranate, methyl citronellate, and methyl (E) -6-2,3-dihydrofarnesoate] were required for optimal attraction. As with C. uhleri, adults of both sexes were attracted to pheromone lures in approximately equal numbers. Because of the decreased volatility (=release rate) of methyl (E)-6-2,3-dihydrofarnesoate in comparison with the other two, lower molecular weight pheromone components, lures needed to be loaded with a disproportionately high amount of methyl (E)-6-2,3-dihydrofarnesoate to obtain the best trap catch. There was no indication that the pheromone components of C. uhleri or E. conspersus interfered with the attractiveness of the C. sayi pheromone in lures containing a blend of all three pheromones"
Keywords:		Animals Equipment Design Hemiptera/drug effects/*physiology Male Odorants Pest Control/instrumentation/*methods Pheromones/*pharmacology Volatile Organic Compounds/pharmacology;
Notes:		"MedlineMillar, Jocelyn G McBrien, Heather M McElfresh, J Steven eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2010/11/11 J Econ Entomol. 2010 Oct; 103(5):1603-12. doi: 10.1603/ec10095"