Citation
Norman K., . and Zulkefli M., . and Basri M. W., . (2011) Monitoring of the parasitic nematode Elaeolenchus parthenonema Nematoda: Sphaerularioidea: Anandranematidae in the oil palm pollinating weevil Elaeidobius kamerunicus Coleoptera: Curculionidae at several locations in Malaysia. [Proceedings Paper]
Abstract
The problem of low fruit set in the oil palm bunch is of concern in some oil palm plantations in Malaysia which relates to the poor pollination of the weevil Elaeidobius kamerunicus. Poor pollination was suggested to be related to the effects of weather weevil population density or parasitic nematode infestation which was detected in the adult weevils. Based on this the study on nematode infestation in Elaeidobius kamerunicus was conducted at several plantations in Malaysia. Various stages of the oil palm were selected for the study from 3 years immature to 15 years old mature. The parasitic nematode Elaeolenchus parthenonema was determined from the adult weevil for five successive days from the anthesising male inflorescence monthly in Lahad Datu Sabah and Lawas Sarawak and in other locations in Peninsular Malaysia at quarterly intervals. The parasitic female nematode was identified by its coiled body found inside the haemolymph of weevil adult and larvae during dissection. The percentage of nematode infestation had fluctuated on the immature and mature palms between 2002 and 2010. The highest infestation was recorded with 20 nematode infestation on adult weevils at MPOB Bangi in December 2002. Quarterly monitoring of the nematode in Peninsular Malaysia between 2004 to 2010 had recorded between 0.57 to 28 nematode infestations while maintaining fruit set above 56.29. The highest larval stage infested with nematode 52.5 was recorded on mature palm at MPOB Lahad Datu with normal fruit set. The younger palm area recorded less than 30 and 20 infestation on larvae and adult weevils respectively. On immature palms in Sabah and Sarawak a survey between 2006 to 2010 has indicated less than 20 occurrence of parasitic nematode on adult weevils but not detected in the larval stage. Throughout the investigation oil palm fruit set had remained satisfactory between 51.2 to 76. These fluctuations in the nematode infestation on adult weevils did not seem to affect the oil palm fruit set formation.
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Abstract
The problem of low fruit set in the oil palm bunch is of concern in some oil palm plantations in Malaysia which relates to the poor pollination of the weevil Elaeidobius kamerunicus. Poor pollination was suggested to be related to the effects of weather weevil population density or parasitic nematode infestation which was detected in the adult weevils. Based on this the study on nematode infestation in Elaeidobius kamerunicus was conducted at several plantations in Malaysia. Various stages of the oil palm were selected for the study from 3 years immature to 15 years old mature. The parasitic nematode Elaeolenchus parthenonema was determined from the adult weevil for five successive days from the anthesising male inflorescence monthly in Lahad Datu Sabah and Lawas Sarawak and in other locations in Peninsular Malaysia at quarterly intervals. The parasitic female nematode was identified by its coiled body found inside the haemolymph of weevil adult and larvae during dissection. The percentage of nematode infestation had fluctuated on the immature and mature palms between 2002 and 2010. The highest infestation was recorded with 20 nematode infestation on adult weevils at MPOB Bangi in December 2002. Quarterly monitoring of the nematode in Peninsular Malaysia between 2004 to 2010 had recorded between 0.57 to 28 nematode infestations while maintaining fruit set above 56.29. The highest larval stage infested with nematode 52.5 was recorded on mature palm at MPOB Lahad Datu with normal fruit set. The younger palm area recorded less than 30 and 20 infestation on larvae and adult weevils respectively. On immature palms in Sabah and Sarawak a survey between 2006 to 2010 has indicated less than 20 occurrence of parasitic nematode on adult weevils but not detected in the larval stage. Throughout the investigation oil palm fruit set had remained satisfactory between 51.2 to 76. These fluctuations in the nematode infestation on adult weevils did not seem to affect the oil palm fruit set formation.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB608 O27M939 2011 Call Number. |
| AGROVOC Term: | Oil palm |
| AGROVOC Term: | Infestation |
| AGROVOC Term: | Plant nematodes |
| AGROVOC Term: | Parasites |
| AGROVOC Term: | Pollination |
| AGROVOC Term: | Elaeidobius kamerunicus |
| AGROVOC Term: | Weevils |
| AGROVOC Term: | Fruit set |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:16 |
| URI: | http://webagris.upm.edu.my/id/eprint/13684 |
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