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An overview of a systems model of cassava and cassava pests in Africa

dc.contributor.authorGutierrez, A.P.
dc.contributor.authorWermelinger, B.
dc.contributor.authorSchulthess, F.
dc.contributor.authorBaumgärtner, J.U.
dc.contributor.authorYaninek, J.S.
dc.contributor.authorHerren, H.R.
dc.contributor.authorNeuenschwander, P.
dc.contributor.authorLohr, B.
dc.contributor.authorHammond, W.N.O.
dc.contributor.authorEllis, C.K.
dc.date.accessioned2020-08-18T09:11:59Z
dc.date.available2020-08-18T09:11:59Z
dc.date.issued1987
dc.identifier.citationGutierrez, A.P., Wermelinger, B., Schulthess, F., Baumgärtner, J.U., Yaninek, J.S., Herren, H.R., ... & Ellis, C.K. (1987). An overview of a systems model of cassava and cassava pests in Africa. International Journal of Tropical Insect Science, 8(4-6), 919-924.
dc.identifier.issn1742-7584
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6944
dc.description.abstractA systems model is described for cassava, Manihot esculenta Crantz, two of its introduced herbivores, the cassava green mite (CGM), Mononychellus tanajoa (Bondar), sensu lato, and the cassava mealybug (CM), Phenacoccus manihoti Mat.-Ferr., the introduced CM parasitoid, Epidinocarsis lopezi (DeSantis) and coccinellid predator of the genus Hyperaspis. The systems model includes the effects of weather, soil nitrogen and water levels on the interactions of the system’s components. The model simulates the distribution of developmental times of cohorts initated at the same time, as well as the number and biomass (energy) dynamics of all populations over time. Biomass acquisition and allocation at the population and organism subunit levels (e.g. leaves, fruit, ova) were also simulated. A common acquisition (i.e. functional response) submodel was used to estimate daily photosynthetic as well as nitrogen and water uptake rates in cassava, in addition to herbivory, parasitism and predation rates for the arthropod species. This paper presents an overview of the systems model. Simulation results for the plant under pest free conditions were compared to field data. In addition, the model was used to estimate tuber yield losses due to CM and CGM feeding, and to examine the beneficial effects of introduced CM natural enemies as measured by reductions in tuber yield losses.
dc.format.extent919-924
dc.language.isoen
dc.subjectCassava
dc.subjectPhenacoccus Manihoti
dc.subjectMononychellus Tanajoa
dc.subjectEpidinocarsis Lopezi
dc.subjectHyperaspis
dc.subjectAfrica
dc.subjectSystems
dc.subjectModels
dc.subjectSimulation Models
dc.titleAn overview of a systems model of cassava and cassava pests in Africa
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationUniversity of California
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitut fur Phytomedizin, Switzerland
cg.coverage.regionAfrica South of Sahara
cg.identifier.bibtexciteidGUTIERREZ:1988a
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectAgronomy
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectPests of Plants
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalInternational Journal of Tropical Insect Science
cg.notesPublished online: 01 Dec 1987
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1017/S1742758400023195
cg.iitaauthor.identifierPeter NEUENSCHWANDER: 0000-0003-0580-0376


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