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15 results on '"Alamsetti, Santosh K."'

8. Limoniic Acid and Its Analog as Trap Lures for Pest Limonius Species (Coleoptera: Elateridae) in North America

Author

van Herk, Willem G, primary, Lemke, Emily, additional, Gries, Gerhard, additional, Gries, Regine, additional, Serrano, Jacqueline M, additional, Catton, Haley, additional, Wanner, Kevin, additional, Landolt, Peter J, additional, Cooper, W Rodney, additional, Meers, Scott, additional, Nikoukar, Atoosa, additional, Smith, Jocelyn L, additional, Alamsetti, Santosh K, additional, and Etzler, Frank E, additional

Published
2021
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10. Limoniic Acid and Its Analog as Trap Lures for Pest LimoniusSpecies (Coleoptera: Elateridae) in North America

Author

van Herk, Willem G, Lemke, Emily, Gries, Gerhard, Gries, Regine, Serrano, Jacqueline M, Catton, Haley, Wanner, Kevin, Landolt, Peter J, Cooper, W Rodney, Meers, Scott, Nikoukar, Atoosa, Smith, Jocelyn L, Alamsetti, Santosh K, and Etzler, Frank E

Abstract

Four species of Limoniuswireworms (Coleoptera: Elateridae), L. californicus, L. canus, L. infuscatusand L. agonus,are serious crop pests in North America. Limoniic acid, (E)-4-ethyloct-4-enoic acid, has been reported as a sex pheromone component of female L. californicusand L. canus, and a sex attractant for male L. infuscatus. In the same study, both limoniic acid and the analog (E)-5-ethyloct-4-enoic acid were highly attractive in field experiments. Moreover, six carboxylic acids in headspace volatiles of Limoniusfemales elicited responses from male antennae but were not tested for behavioral activity. Here, we report trap catch data of Limoniusspp. obtained in field experiments at 27 sites across North America. All four Limoniusspecies were attracted to limoniic acid and to the analog but not to the carboxylic acids. Adding these carboxylic acids to limoniic acid, or to the analog, reduced its attractiveness. In dose–response studies, trap lures containing 0.4 mg or 4 mg of limoniic acid afforded large captures of L. californicusand L. infuscatus. Neither limoniic acid nor the analog were deterrent to other elaterid pest species. The broad attractiveness of limoniic acid to Limoniusspp., and its non-deterrent effect on heterogeners, may facilitate the development of generic pheromone-based monitoring and management tools for multiple click beetle species.

Published
2021
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15. Maculatic Acids-Sex Attractant Pheromone Components of Bald-Faced Hornets.

Author

Ren W, Gries R, McCaughey C, Derstine N, Alamsetti SK, Kurita KL, Tu L, Linington RG, Britton R, and Gries G

Subjects
Animals, Chromatography, High Pressure Liquid, Female, Gas Chromatography-Mass Spectrometry, Magnetic Resonance Spectroscopy, Male, Pheromones analysis, Sex Attractants analysis, Wasps chemistry, Pheromones metabolism, Sex Attractants metabolism, Wasps metabolism
Abstract

Yellowjackets in the genera Vespula and Dolichovespula are prevalent eusocial insects of great ecological and economic significance, but the chemical signals of their sexual communication systems have defied structural elucidation. Herein, we report the identification of sex attractant pheromone components of virgin bald-faced hornet queens (Dolichovespula maculata). We analyzed body surface extracts of queens by coupled gas chromatographic-electroantennographic detection (GC-EAD), isolated the compounds that elicited responses from male antennae by high-performance liquid chromatography (HPLC), and identified these components by GC mass spectrometry (MS), HPLC-MS, and NMR spectroscopy. In laboratory olfactometer experiments, synthetic (2Z,7E)-3,7-dimethyldeca-2,7-diendioic acid (termed here maculatic acid A) and (2Z,7E)-10-methoxy-3,7-dimethyldeca-10-oxo-deca-2,7-dienoic acid (termed here maculatic acid C) in binary combination significantly attracted bald-faced hornet males. These are the first sex attractant pheromone components identified in yellowjackets., (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2018
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