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Die insekplaagkompleks op sitrus te Vaalharts
Thesis (MSc)--Stellenbosch University, 2000.
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| Other Authors: | |
| Format: | Thesis |
| Language: | af_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613738736025600 |
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| access_status_str | Open Access |
| author | Mathewson, Johanna |
| author2 | Geertsema, H. |
| author_browse | Geertsema, H. Mathewson, Johanna |
| author_facet | Geertsema, H. Mathewson, Johanna |
| author_sort | Mathewson, Johanna |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc)--Stellenbosch University, 2000. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/51706 |
| institution | Stellenbosch University (South Africa) |
| language | af_ZA |
| last_indexed | 2026-06-10T12:40:55.520Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/51706 Die insekplaagkompleks op sitrus te Vaalharts Mathewson, Johanna Geertsema, H. Stellenbosch University. Faculty of AgriScience. Dept. of Conservation Ecology and Entomology. Citrus -- Diseases and pests -- South Africa -- Vaalharts Citrus -- Diseases and pests -- Control -- South Africa -- Vaalharts Insect pests -- Control -- South Africa -- Vaalharts Insect pests -- South Africa -- Vaalharts Thesis (MSc)--Stellenbosch University, 2000. ENGLISH ABSTRACT: The cultivation of citrus in the Vaalharts region is a fairly recent development. With the introduction of this crop, an insect pest complex has also developed in this region. The presence of these pests was studied in eleven orchards, planted with three citrus cultivars and of varying ages, distributed in the 300 square kilometer cultivation area. Each orchard was inspected for the presence of pests by making use of two weekly sampling techniques. Ten of the most important insect pests of citrus in the Vaalharts region are briefly described by refering to their general appearance, life cycles, feeding and pest status and economic threshold. For every pest various control options, including operational systems, crop cultivation, biological and chemical control, are discussed and, where applicable, illustrated by means of graphic presentations. The seasonal presence of the cirtrus pests in the Vaalharts region is tabulated and discussed individually. With these details as background, an insect pest management programme for citrus in the Vaalharts region is compiled. AFRIKAANSE OPSOMMING: Die verbouing van sitrus in die Vaalhartsgebied is 'n redelik onlangse ontwikkeling. Gepaard met die nuwe gewas het daar ook 'n insekplaagkompleks in die gebied ontstaan. Die voorkoms van die plae is in elt .boorde, beplant met drie sitruskultivars en van verskillende ouderdomme, verspreid in die 300 vierkante kilometer verbouingsareaal, bestudeer. Elk van die boorde is weekliks ondersoek vir die aanwesigheid van plae deur van twee moniteringstegnieke gebruik te maak. Die tien belangrikste insekplae van sitrus in die Vaalhartsgebied word kortliks beskryf deur na hulle algemene voorkoms, lewenssiklus, voeding en plaagstatus en ekonomiese drempelwaardes asook die moniteringsmetodes wat gebruik is, te verwys. Vir elke plaag word beheeropsies, wat operasionele stelsels, gewasverbouing, bloloqlese en chemiese beheer insluit, bespreek wat, waar toepaslik, aan die hand van grafiese voorstellings gemustreer word. Die seisoenale aanwesigheid van die sitrusplae word in 'n tabel aangedui en individueel bespreek. Met die gegewens as agtergrond is 'n insekplaagbestuurprogram vir sitrus in die Vaalhartsgebied opgestel. Masters 2012-08-27T11:34:38Z 2012-08-27T11:34:38Z 2000-03 Thesis http://hdl.handle.net/10019.1/51706 af_ZA Stellenbosch University 87 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Citrus -- Diseases and pests -- South Africa -- Vaalharts Citrus -- Diseases and pests -- Control -- South Africa -- Vaalharts Insect pests -- Control -- South Africa -- Vaalharts Insect pests -- South Africa -- Vaalharts Mathewson, Johanna Die insekplaagkompleks op sitrus te Vaalharts |
| title | Die insekplaagkompleks op sitrus te Vaalharts |
| title_full | Die insekplaagkompleks op sitrus te Vaalharts |
| title_fullStr | Die insekplaagkompleks op sitrus te Vaalharts |
| title_full_unstemmed | Die insekplaagkompleks op sitrus te Vaalharts |
| title_short | Die insekplaagkompleks op sitrus te Vaalharts |
| title_sort | die insekplaagkompleks op sitrus te vaalharts |
| topic | Citrus -- Diseases and pests -- South Africa -- Vaalharts Citrus -- Diseases and pests -- Control -- South Africa -- Vaalharts Insect pests -- Control -- South Africa -- Vaalharts Insect pests -- South Africa -- Vaalharts |
| url | http://hdl.handle.net/10019.1/51706 |
| work_keys_str_mv | AT mathewsonjohanna dieinsekplaagkompleksopsitrustevaalharts |