Distribution of retroacizzia Mopani and its natural enemies in Tshikundamalema Area, Limpopo Province, South Africa

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dc.contributor.advisor Kunjeku, E. C.
dc.contributor.advisor Hurley, B. P.
dc.contributor.author Mmbengeni, Rofhiwa Isaac
dc.date.accessioned 2017-10-31T07:17:08Z
dc.date.available 2017-10-31T07:17:08Z
dc.date.issued 2017-09-18
dc.identifier.uri http://hdl.handle.net/11602/928
dc.description MSCAGR (Plant Production)
dc.description Department of Plant Production
dc.description.abstract Colophospermum mopane (Fabaceae), commonly known as mopane tree, is an indigenous tree species in Southern Africa, often being the dominant species in semi-arid areas. It plays an integral part in the improvement of communities’ livelihoods when it is harvested for firewood and mopane worms which are edible insects are collected from the tree. Colophospermum mopane is host to many insects, among them Retroacizzia mopani, a leaf pest. Retroacizzia mopani produces lerps which are protective exudates that shield the insect from predation, but lerps also reduce the photosynthetic area of mopane leaves. This study aimed to determine the distribution of the African mopane psyllid, R. mopani and its natural enemies in the Tshikundamalema area, in Limpopo Province. The study assessed the presence of lerps on C. mopane, as well as determining the effect of site, tree height, tree density, tree position, branch size and neighbouring trees on R. mopani infestations at three sites. Sample of leaves infested with R. mopani were collected at six different sites and reared in the laboratory to determine the prevalence of R. mopani natural enemies and the levels of parasitism. The site, tree density, tree position, and branch size had an effect on the R. mopani infestations. The results showed that as the tree density, tree height and branch size increased, R. mopani infestation also increased. Neighbouring trees had no effect on R. mopani infestations. Trees found at the edge of the forest were more heavily infested compared to those that were inside the forest. All the three sites had low levels of parasitism by the natural enemy, Psyllaephagus arytainae Prinsloo. This indicates that P. arytainae has little effect on population dynamics of the psyllids. en_US
dc.format.extent 1 online resource ( x, 70 leaves : color illustrations, color maps)
dc.language.iso en en_US
dc.rights University of Venda
dc.subject Colophospermum mopane en_US
dc.subject Insect distribution en_US
dc.subject Natural enemies en_US
dc.subject Parasitism en_US
dc.subject Psyllaephagus arytainae en_US
dc.subject Ratroacizzaia mopani en_US
dc.subject.ddc 583.740968257
dc.subject.lcsh Mopane tree -- South Africa -- Limpopo
dc.subject.lcsh Mopane tree -- South Africa -- Limpopo
dc.subject.lcsh Colosphospermum -- South Africa -- Limpopo
dc.title Distribution of retroacizzia Mopani and its natural enemies in Tshikundamalema Area, Limpopo Province, South Africa en_US
dc.type Dissertation en_US

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