{"id":{"repo_id":"pretoria","oai_identifier":"oai:repository.up.ac.za:2263/85444"},"canonical_url":"https://search.dev.ndltd.org/etd/pretoria/oai:repository.up.ac.za:2263/85444","repository":{"repo_id":"pretoria","name":"University of Pretoria","base_url":"https://repository.up.ac.za/server/oai/request"},"display":{"title":"The bio-ecology, economical importance and control of three saturniids injurious to forest trees","abstract":"The pine emperor Nudaurelia cytherea clarki Geertsema, the poplar emperor, Pseudobunaea irius (F.) and the pine-bark emperor, llolocerina smilax (Westw .), are three important defoliators of especially Pinus patula Schlechtd. & Cham. trees. These studies were undertaken to gain more knowledge of the biology and ecology of these insects, so that effective and economical methods of controlling them can be devised. A further aim was to make a comparison between the potential wood loss, as a result of defoliation, and the cost of insecticidal spraying.","abstract_html":"The pine emperor Nudaurelia cytherea clarki Geertsema, the poplar emperor, Pseudobunaea irius (F.) and the pine-bark emperor, llolocerina smilax (Westw .), are three important defoliators of especially Pinus patula Schlechtd. & Cham. trees. These studies were undertaken to gain more knowledge of the biology and ecology of these insects, so that effective and economical methods of controlling them can be devised. A further aim was to make a comparison between the potential wood loss, as a result of defoliation, and the cost of insecticidal spraying.","abstract_has_math":false,"creators":[],"institution":"University of Pretoria","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Smit, C.J.B."],"committee_chairs":[],"committee_members":[],"year":1971,"date_issued":"1971","date_published":"1971","updated_at":"2026-07-24T03:52:42Z","subjects":["UCTD","Bio-ecology","economical importance","control","saturniids injurious","forest trees"],"languages":["en"],"rights":["© 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://repository.up.ac.za/handle/2263/85444","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Smit, C.J.B."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2022-05-17T11:21:21Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2022-05-17T11:21:21Z"]},{"key":"dc:date.issued","label":"Date","values":["1971"]},{"key":"dc:publisher","label":"Institution","values":["University of Pretoria"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["UCTD","Bio-ecology","economical importance","control","saturniids injurious","forest trees"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["© 2020 University of Pretoria. 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These studies were undertaken to gain more knowledge of the biology and ecology of these insects, so that effective and economical methods of controlling them can be devised. 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No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria."],"dc:subject":["UCTD","Bio-ecology","economical importance","control","saturniids injurious","forest trees"],"dc:title":["The bio-ecology, economical importance and control of three saturniids injurious to forest trees"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T03:52:42Z"}