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Exploring levels of egg parasitism and variation in egg cuticular chemistry in different Clavigralla spp.

dc.contributor.authorKpongbe, H.
dc.contributor.authorBerg, J. van den
dc.contributor.authorKhamis, F.
dc.contributor.authorTamò, M.
dc.contributor.authorTalamas, E.J.
dc.contributor.authorTorto, B.
dc.date.accessioned2019-12-04T11:33:52Z
dc.date.available2019-12-04T11:33:52Z
dc.date.issued2019-05-16
dc.identifier.citationKpongbe, H., Van den Berg, J., Khamis, F., Tamò, M., Talamas, E.J. & Torto, B. (2019). Exploring levels of egg parasitism and variation in egg cuticular chemistry in different Clavigralla spp. Journal of Applied Entomology, 1-13.
dc.identifier.issn0931-2048
dc.identifier.urihttps://hdl.handle.net/20.500.12478/5834
dc.description.abstractClavigralla spp. (Hemiptera: Coreidae) are major pests of cowpea (Vigna unguiculata (L.) Walp, Fabacae), common bean (Phaseolus vulgaris L., Fabacae) and pigeon pea (Cajanus cajan L., Fabacae) in Africa. Clavigralla spp. egg parasitoids, Gryon spp. (Hymenoptera: Scelionidae), have previously been reported as potential biological control candidates. Little is known about the parasitism levels and their potential relationship with cuticular chemistry of Clavigralla spp. The aims of this study were to determine parasitism levels of Clavigralla tomentosicollis Stål (Hemiptera: Coreidae) and C. elongata Signoret (Hemiptera: Coreidae) eggs, and to explore the relationship between egg parasitism and egg cuticular chemistry. High parasitism levels were determined for C. tomentosicollis by collecting eggs from plants in mono‐cropping and multi‐cropping systems in farmers’ fields in Bénin and Kenya between April and June 2016. Three species of Clavigralla were recorded: C. tomentosicollis, C. shadabi and C. elongata. Clavigralla tomentosicollis was the most common in both countries, while C. shadabi and C. elongata were only collected in Bénin and Kenya, respectively. An egg parasitoid (Gryon sp.) was recovered from egg batches collected from both countries. In parasitism assays using Gryon sp., the incidence of parasitism was higher in C. tomentosicollis eggs than that of C. elongata. Chemical analysis by coupled gas chromatography/mass spectrometry (GC/MS) of cuticular extracts obtained from C. tomentosicollis and C. elongata eggs identified fifteen compounds including ten alkanes of which the amounts varied between the two species. We speculate that Clavigralla spp. cuticular chemistry may serve as potential host location cues for Gryon sp.
dc.description.sponsorshipSwedish International Development Cooperation Agency
dc.description.sponsorshipSwiss Agency for Development and Cooperation
dc.description.sponsorshipGerman Academic Exchange Service
dc.description.sponsorshipDepartment for International Development, United Kingdom
dc.format.extent1-13
dc.language.isoen
dc.rightsCopyrighted; all rights reserved
dc.subjectEggs
dc.subjectParasitoids
dc.subjectParasitism
dc.subjectPods
dc.subjectSucking Insects
dc.subjectSemiochemicals
dc.titleExploring levels of egg parasitism and variation in egg cuticular chemistry in different Clavigralla spp.
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Centre of Insect Physiology and Ecology
cg.contributor.affiliationNorth‐West University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationFlorida Department of Agriculture and Consumer Services
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.regionWest Africa
cg.coverage.countryKenya
cg.coverage.countryNigeria
cg.creator.identifierManuele Tamò: 0000-0002-5863-7421
cg.researchthemePLANT PRODUCTION & HEALTH
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectPests Of Plants
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalJournal of Applied Entomology
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid105362
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1111/jen.12647


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