Skip navigation

Effect of lure age and blend on sex pheromone trap catches of the mirid Sahlbergella singularis on cacao in Ghana

Effect of lure age and blend on sex pheromone trap catches of the mirid Sahlbergella singularis on cacao in Ghana

Sarfo, Joseph E., Campbell, Colin A.M. and Hall, David R. ORCID: 0000-0002-7887-466X (2020) Effect of lure age and blend on sex pheromone trap catches of the mirid Sahlbergella singularis on cacao in Ghana. Crop Protection, 138:105344. ISSN 0261-2194 (doi:https://doi.org/10.1016/j.cropro.2020.105344)

[img]
Preview
PDF (Author's Accepted Manuscript)
29575 HALL_Effect_Of_Lure_Age_And_Blend_On_Sex_Pheromone_Trap_(AAM)_2020.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (225kB) | Preview

Abstract

Mirids, Sahlbergella singularis and Distantiella theobroma (Heteroptera: Miridae), are the main cacao pests in West Africa. Females of both species produce sex pheromones composed of hexyl (R)-3-((E)-2-butenoyl)-butyrate and hexyl (R)-3-hydroxybutyrate, the major and minor components, respectively. Lures composed of 1000:500 µg blends of the two components pre-aged for 2, 4, 8 and 12 weeks were compared with fresh lures in a field experiment in Ghana. Lures were replaced monthly. A total of 272 S. singularis, all male, was caught. Fresh lures and those pre-aged for 2 and 4 weeks caught similar numbers in a month while lures pre-aged for 8 and 12 weeks caught 34 % and 26 %, respectively, than fresh lures. The attractiveness of five different pheromone blends were compared in a 15-month field trapping experiment. A total of 701 S. singularis, all male, was caught. The highest numbers were caught in traps releasing both components with no significant difference among 1000:50, 1000:500 and1000:1000 µg blends. Traps releasing hexyl (R)-3-((E)-2-butenoyl)-butyrate alone caught fewer individuals than two-component blends, and those releasing hexyl (R)-3-hydroxybutyrate alone caught similarly low numbers to unbaited controls. We recommend that 2:1 blend lures, renewed at least bi-monthly are used for mass-trapping cacao mirids. The results are discussed in relation to previously published mirid pheromone blend optimisation and longevity studies.

Item Type: Article
Uncontrolled Keywords: theobroma cacao, pheromone trap, sahlbergella singularis, lure longevity, pheromone blend
Subjects: S Agriculture > S Agriculture (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Faculty of Engineering & Science > Natural Resources Institute > Chemical Ecology Research Group
Last Modified: 09 Aug 2021 01:38
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/29575

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics