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Visual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations

dc.contributor.authorMahot, H.C.
dc.contributor.authorMahob, J.R.
dc.contributor.authorHall, D.R.
dc.contributor.authorArnold, S.E.J.
dc.contributor.authorFotso, A.K.
dc.contributor.authorMembang, G.
dc.contributor.authorEwane, N.
dc.contributor.authorKemga, A.
dc.contributor.authorFiaboe, K.K.M.
dc.contributor.authorBilong, C.F.B
dc.contributor.authorHanna, R.
dc.date.accessioned2019-12-04T11:36:54Z
dc.date.available2019-12-04T11:36:54Z
dc.date.issued2020
dc.identifier.citationMahot, H.C., Mahob, J.R., Hall, D.R., Arnold, S.E., Fotso, A.K., Membang, G., ... & Hanna, R. (2020). Visual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations. Crop Protection, 127, 1-7.
dc.identifier.issn0261-2194
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6380
dc.descriptionPublished online: 12 Sept 2019
dc.description.abstractCocoa mirids, Sahlbergella singularis and Distantiella theobroma, are the most economically important insect pests of cocoa in West and Central Africa, where they can cause up to 40% losses in cocoa yields. Sahlbergella singularis is the most common species in Cameroon and was therefore targeted in this study. During a two-year trial in 15 cocoa plantations in Ayos and Konye, in the Centre and Southwest regions of Cameroon respectively, the most effective colour – white, purple or green – of sex pheromone traps was examined for integration into mirid management programmes. Similar temporal patterns in S. sahlbergella male trap catches were observed with all three colours, but the green trap caught more S. singularis (Ayos: 0.968 ± 0.091 [SEM]; Konye: 0.640 ± 0.076/trap/month) compared with purple traps (Ayos: 0.674 ± 0.068; Konye: 0.441 ± 0.058), and white traps (Ayos: 0.467 ± 0.049, Konye: 0.253 ± 0.041). Trap reflectance showed wavelength peaks typical for purple in both short (approximately 380–480 nm) and long wavelengths (>650 nm), and ~530 nm for green. Reflectance peaks exceeded 100% of the incident light in the 400–450 nm range from the white, suggesting the presence of optical brighteners. Trap catches support the hypothesis that S. singularis ocelli are more responsive to light of shorter wavelengths. Despite the low attractiveness of the sex pheromone to S. singularis, a optimisation of the colour of the trap can improve S. sahlbergella monitoring, mass trapping, and other control measures which could ultimately lead to reductions of insecticide use and to conservation of beneficial arthropods, particularly cocoa flower pollinators that are critical for improving cacao tree productivity.
dc.description.sponsorshipDutch Development Organization
dc.description.sponsorshipGerman Corporation for International Cooperation GmbH
dc.format.extent1-7
dc.language.isoen
dc.rightsCopyrighted; all rights reserved
dc.subjectTheobroma Cacao
dc.subjectProduction
dc.subjectPlantations
dc.subjectPlant Diseases
dc.subjectCameroon
dc.titleVisual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitute of Agricultural Research for Development, Cameroon
cg.contributor.affiliationUniversity of Yaoundé
cg.contributor.affiliationUniversity of Greenwich
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryCameroon
cg.creator.identifierFotso Kuate, A.: 0000-0002-5247-7519
cg.creator.identifierRachid Hanna: 0000-0002-5715-0144
cg.researchthemePLANT PRODUCTION & HEALTH
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectBanana
cg.iitasubjectCocoa
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalCrop Protection
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid108047
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1016/j.cropro.2019.104959


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