Hall, David R. ORCID: 0000-0002-7887-466X , Serrano, Jacqueline, Yokota, Glenn Y., Nieto, Diego J., Farman, Dudley I. ORCID: 0000-0003-3579-3672 , McElfresh, J. Stephen, Del Pozo-Valdivia, Alejandro I., Millar, Jocelyn G. and Daane, Kent M. (2024) Development of practical pheromone lures for Lygus hesperus and Lygus elisus (Heteroptera: Miridae). Journal of Economic Entomology. ISSN 0022-0493 (Print), 1938-291X (Online) (In Press)

PDF (Author's Accepted Manuscript (AAM)) 48008 HALL_Development_Of_Practical_Pheromone_Lures_For_Lygus_Hesperus_And_Lygus_Elisus_Heteroptera_Miridae_(AAM)_2024.pdf - Accepted Version Restricted to Repository staff only Download (1MB) | Request a copy

Abstract

The mirid bugs Lygus hesperus (Knight) and L. elisus (van Duzee) are key pests of forage, fiber, and fruit crops. Our goals were to identify pheromone components produced by females of both species, and to develop practical pheromone dispensers for use in monitoring these pests. Volatiles collected from virgin female L. elisus contained (E)-2-hexenyl butyrate (E2HB) as the major component with lesser amounts of hexyl butyrate (HB) and (E)-4-oxo-2-hexenal (E4OH), whereas volatiles and solvent extracts from L. hesperus 35 contained HB and E4OH as major components, with only small amounts of E2HB. Dispensers fabricated from plastic pipette tips released the pheromone components at ~10 μg/d in a ratio similar to that loaded in the dispenser. These lures were used to optimize the 38 pheromone blends, in field studies conducted from 2012- 2017. Blends of E2HB and E4OH attracted L. elisus, and a 100:60 blend was optimal. Blends of HB and E4OH attracted L. hesperus and a 100:60 blend was adopted as a base blend. The additions of possible minor components such as (Z)-3-hexenyl butyrate, (E)-2-hexenal, or 1-hexanol did not improve attraction of L. hesperus. In field trials in alfalfa and strawberry, traps baited with blends of 43 HB:4OH (100:60) were equally or more effective for monitoring L. hesperus than grower-standard sweep or vacuum samples, with pipette tip dispensers lasting 2-3 wk under field conditions. The numbers of L. hesperus captured were lower than expected as compared with reports of pheromone trapping for other Lygus spp., and some possible reasons for this were investigated.

Item Type:	Article
Uncontrolled Keywords:	western tarnished plant bug, pale legume bug, monitoring, sticky cards, hexyl butyrate, (E)-2-hexenyl butyrate, (E)-4-oxo-2-hexenal
Subjects:	Q Science > Q Science (General) Q Science > QK Botany S Agriculture > S Agriculture (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Centre for Sustainable Agriculture 4 One Health Faculty of Engineering & Science > Natural Resources Institute > Centre for Sustainable Agriculture 4 One Health > Chemical Ecology & Plant Biochemistry
Last Modified:	28 Oct 2024 09:57
URI:	http://gala.gre.ac.uk/id/eprint/48008

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