Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm

Pteroma pendula Joannis and Metisa plana Walker are important pests of the oil palm Elaeis guineensis Jacquin, which is the primary agricultural crop of Malaysia. Although there is a history of the integrated management of the bagworms, information gaps exist with regard to their incidence, biolo...

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محفوظ في:
التفاصيل البيبلوغرافية
المؤلف الرئيسي: Ho, Cheng Tuck
التنسيق: أطروحة
اللغة:English
English
منشور في: 2002
الموضوعات:
الوصول للمادة أونلاين:http://psasir.upm.edu.my/id/eprint/10611/1/FP_2002_26.pdf
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id my-upm-ir.10611
record_format uketd_dc
spelling my-upm-ir.106112024-04-26T03:15:21Z Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm 2002-09 Ho, Cheng Tuck Pteroma pendula Joannis and Metisa plana Walker are important pests of the oil palm Elaeis guineensis Jacquin, which is the primary agricultural crop of Malaysia. Although there is a history of the integrated management of the bagworms, information gaps exist with regard to their incidence, biology, dispersion and population dynamics. Work of this thesis was aimed at overcoming these deficiencies and using the new information to improve integrated management of the pests. Analysis of historical records of bagworm infestations over 63,955 ha of oil palms in 69 estates in Peninsular Malaysia showed P. pendula and M plana to be the primary pests. Infestations were single species or mixed and ranged from nil to 7,8 11 ha per year. Cumulative infestation was 1 8,297 ha, 4,904 ha and 14,607 ha for single species P. pendula, M plana and mixed species P. pendula and M plana respectively. This showed P. pendula to be the predominant species. This was attributed to greater intrinsic rate of population increase, fm, and finite rate of population increase, A, for the species as well as its ability to survive very wet weather. Lower energy requirement for completion of life cycle and likewise propensity to balloon (which otherwise predisposed wash-off by rain) were established as reasons for this. Synchrony of P. pendula and M plana populations within and across estates was verified. Rainfall was indicated to be the primary factor synchronizing bagworm populations, particularly over wide areas, through their deleterious effects on survivorship of the pests. Short adult life span and overlapping if not synchronous emergence of males and females, pheromone-based male attraction to apterous females, regular dispersion of populations and natural enemies were postulated as other factors. Lepidoptera - Oil palm - Case studies 2002-09 Thesis http://psasir.upm.edu.my/id/eprint/10611/ http://psasir.upm.edu.my/id/eprint/10611/1/FP_2002_26.pdf text en public doctoral Universiti Putra Malaysia Lepidoptera - Oil palm - Case studies Faculty of Agriculture Khoo, Khay Chong English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
advisor Khoo, Khay Chong
topic Lepidoptera - Oil palm - Case studies


spellingShingle Lepidoptera - Oil palm - Case studies


Ho, Cheng Tuck
Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
description Pteroma pendula Joannis and Metisa plana Walker are important pests of the oil palm Elaeis guineensis Jacquin, which is the primary agricultural crop of Malaysia. Although there is a history of the integrated management of the bagworms, information gaps exist with regard to their incidence, biology, dispersion and population dynamics. Work of this thesis was aimed at overcoming these deficiencies and using the new information to improve integrated management of the pests. Analysis of historical records of bagworm infestations over 63,955 ha of oil palms in 69 estates in Peninsular Malaysia showed P. pendula and M plana to be the primary pests. Infestations were single species or mixed and ranged from nil to 7,8 11 ha per year. Cumulative infestation was 1 8,297 ha, 4,904 ha and 14,607 ha for single species P. pendula, M plana and mixed species P. pendula and M plana respectively. This showed P. pendula to be the predominant species. This was attributed to greater intrinsic rate of population increase, fm, and finite rate of population increase, A, for the species as well as its ability to survive very wet weather. Lower energy requirement for completion of life cycle and likewise propensity to balloon (which otherwise predisposed wash-off by rain) were established as reasons for this. Synchrony of P. pendula and M plana populations within and across estates was verified. Rainfall was indicated to be the primary factor synchronizing bagworm populations, particularly over wide areas, through their deleterious effects on survivorship of the pests. Short adult life span and overlapping if not synchronous emergence of males and females, pheromone-based male attraction to apterous females, regular dispersion of populations and natural enemies were postulated as other factors.
format Thesis
qualification_level Doctorate
author Ho, Cheng Tuck
author_facet Ho, Cheng Tuck
author_sort Ho, Cheng Tuck
title Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
title_short Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
title_full Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
title_fullStr Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
title_full_unstemmed Ecological Studies on Pteroma Pendula Joannis and Metisa Plana Walker (Lepidoptera: Psychidae) Towards Improved Integrated Management of Infestations in Oil Palm
title_sort ecological studies on pteroma pendula joannis and metisa plana walker (lepidoptera: psychidae) towards improved integrated management of infestations in oil palm
granting_institution Universiti Putra Malaysia
granting_department Faculty of Agriculture
publishDate 2002
url http://psasir.upm.edu.my/id/eprint/10611/1/FP_2002_26.pdf
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