Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe

The bagworm (Lepidoptera: Psychidae) is one of the plant leaf-eating insect pest causing outbreak in oil palm plantations in Malaysia especially in Perak. In fact, a severe infestation by bagworm cause yield losses of more than 50% over few years. The study aimed to determine the population dynamic...

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Main Author:	Rakibe, Ismail
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Oil-bearing plants Wax plants
Online Access:	https://ir.uitm.edu.my/id/eprint/60722/1/60722.pdf
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spelling	my-uitm-ir.607222022-06-01T02:26:16Z Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe 2020-12 Rakibe, Ismail Oil-bearing plants. Wax plants Pest control and treatment of diseases. Plant protection The bagworm (Lepidoptera: Psychidae) is one of the plant leaf-eating insect pest causing outbreak in oil palm plantations in Malaysia especially in Perak. In fact, a severe infestation by bagworm cause yield losses of more than 50% over few years. The study aimed to determine the population dynamic of bagworms, natural enemies and competitor insects in assessing the effect from plant traits, climatic factors, and plant response in order to develop control strategies based on influence of multi-trophic system. All related sampling was properly collected in both immature and mature oil palm. Leaves sampling also be done in field and leave analysis in laboratory over a sampling period. Furthermore, analysis between trophic level was conducted to evaluate the direct impact between bagworms population and its variables. As result, the study had confirmed that the natural enemies played a key role in suppressing the bagworm population. Goryphus bunoh is one of the parasitoid species detected that highly influence on the population number of bagworms where statistically shows that there was significant correlation between Goryphus bunoh and bagworm, especially in mature oil palm area. Thus, effect on C:N ratio also contributing as significant relationship (N=240, P<0.05, r=-0.203) towards population of bagworms in mature oil palm area. However, contradict result was observed in immature oil palm area compared to mature oil palm area (N=240, P>0.05, r=0.069). The climatic factors particularly temperature, and rainfall was negatively affected while positive result was affected on relative humidity. towards the population of bagworms. Meanwhile, the induction of TPC and TFC activities was detectable and appeared differently upon both mature and immature oil palm area. The findings showed that negative correlation between both TPC and TFC against population of M. plana and P. pendula in mature oil palm. Therefore, analysis of multi-trophic level based on the RDA models shows that bagworm (M. plana and P. pendula) was highly correlated with number of parasitoids in both mature and immature oil palm areas. Thus, the TFC and relative humidity were also more influence on the population of bagworms. Based on this information, the trend of biotic and abiotic factors was able to predict precisely by this multi-trophic system model. Hence, this would be formulated the strategies based on the trend of major controlling variable that influenced and affect the population number of bagworms. In order to regulate the high population of bagworm, it is suggested that natural enemies and plant traits component (C:N ratio, TPC and TFC) to be enhanced further. The plant traits component can be enhanced by practising efficient nutrient management and natural enemies can be enhanced via planting beneficial plant in the oil palm plantation. Enhancement of natural enemies would be better option due to environment and health awareness. 2020-12 Thesis https://ir.uitm.edu.my/id/eprint/60722/ https://ir.uitm.edu.my/id/eprint/60722/1/60722.pdf text en public phd doctoral Universiti Teknologi MARA Faculty of Plantation Management and Agrotechnology Zaini, Mohd Rasdi (Assoc. Prof. Dr.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Zaini, Mohd Rasdi (Assoc. Prof. Dr.)
topic	Oil-bearing plants Wax plants Oil-bearing plants Wax plants
spellingShingle	Oil-bearing plants Wax plants Oil-bearing plants Wax plants Rakibe, Ismail Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
description	The bagworm (Lepidoptera: Psychidae) is one of the plant leaf-eating insect pest causing outbreak in oil palm plantations in Malaysia especially in Perak. In fact, a severe infestation by bagworm cause yield losses of more than 50% over few years. The study aimed to determine the population dynamic of bagworms, natural enemies and competitor insects in assessing the effect from plant traits, climatic factors, and plant response in order to develop control strategies based on influence of multi-trophic system. All related sampling was properly collected in both immature and mature oil palm. Leaves sampling also be done in field and leave analysis in laboratory over a sampling period. Furthermore, analysis between trophic level was conducted to evaluate the direct impact between bagworms population and its variables. As result, the study had confirmed that the natural enemies played a key role in suppressing the bagworm population. Goryphus bunoh is one of the parasitoid species detected that highly influence on the population number of bagworms where statistically shows that there was significant correlation between Goryphus bunoh and bagworm, especially in mature oil palm area. Thus, effect on C:N ratio also contributing as significant relationship (N=240, P<0.05, r=-0.203) towards population of bagworms in mature oil palm area. However, contradict result was observed in immature oil palm area compared to mature oil palm area (N=240, P>0.05, r=0.069). The climatic factors particularly temperature, and rainfall was negatively affected while positive result was affected on relative humidity. towards the population of bagworms. Meanwhile, the induction of TPC and TFC activities was detectable and appeared differently upon both mature and immature oil palm area. The findings showed that negative correlation between both TPC and TFC against population of M. plana and P. pendula in mature oil palm. Therefore, analysis of multi-trophic level based on the RDA models shows that bagworm (M. plana and P. pendula) was highly correlated with number of parasitoids in both mature and immature oil palm areas. Thus, the TFC and relative humidity were also more influence on the population of bagworms. Based on this information, the trend of biotic and abiotic factors was able to predict precisely by this multi-trophic system model. Hence, this would be formulated the strategies based on the trend of major controlling variable that influenced and affect the population number of bagworms. In order to regulate the high population of bagworm, it is suggested that natural enemies and plant traits component (C:N ratio, TPC and TFC) to be enhanced further. The plant traits component can be enhanced by practising efficient nutrient management and natural enemies can be enhanced via planting beneficial plant in the oil palm plantation. Enhancement of natural enemies would be better option due to environment and health awareness.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Rakibe, Ismail
author_facet	Rakibe, Ismail
author_sort	Rakibe, Ismail
title	Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
title_short	Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
title_full	Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
title_fullStr	Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
title_full_unstemmed	Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe
title_sort	study of bagworms (metisa plana and pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / ismail rakibe
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Plantation Management and Agrotechnology
publishDate	2020
url	https://ir.uitm.edu.my/id/eprint/60722/1/60722.pdf
_version_	1783735160789794816

Study of bagworms (Metisa plana and Pteroma pendula) infestation in relation to multi-trophic system on oil palm plantation / Ismail Rakibe

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