Preliminary observations on a field population of Elaeidobius kamerunicus the oil palm pollinating weevil, in NIFOR, Benin, Nigeria

Aisagbonhi, C. I. and Norman Kamarudin, . and Okwuagwu, C. O. and Mohd Basri Wahid, . and Jackson, Trevor and Adaigbe, V. (2003) Preliminary observations on a field population of Elaeidobius kamerunicus the oil palm pollinating weevil, in NIFOR, Benin, Nigeria. [Proceedings Paper]

Anthesising male inflorescence were randomly sampled, one per palm in NIFOR (field 56), Benin, Nigeria. Five spikelets were randomly sampled from the top, middle, and bottom regions of each inflorescence on each day of survey, from March to September, 2002. Preliminary observations indicates a mean weevil distribution per spike let of 51. 40 + 4.36 at the top, 52.48 + 5.32 at the middle, and 46.20 + 4.36 at the bottom of each inflorescence. There were no significant differences in the mean numbers of adults weevils in the various positions, but there were significant differences in the mean number of adult weevils sampled in the various dates. (P=0.001). Microscopic examination of adult weevils indicate that nematodes are associated with the weevils and the spike lets. Results of this preliminary survey so far indicates that E. kamerunicus is a major insect pollinator of the oil palm in NIFOR oil Palm plantations. The association of these parasitic nematodes may have implication on their pollination efficiencies. Results of these findings will help in elucidating on one of the factors that govern pollination efficiency, percentage fruit set and the occurrence of seasonal peak in Fresh Fruit Bunches in Nigeria.

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Abstract

Anthesising male inflorescence were randomly sampled, one per palm in NIFOR (field 56), Benin, Nigeria. Five spikelets were randomly sampled from the top, middle, and bottom regions of each inflorescence on each day of survey, from March to September, 2002. Preliminary observations indicates a mean weevil distribution per spike let of 51. 40 + 4.36 at the top, 52.48 + 5.32 at the middle, and 46.20 + 4.36 at the bottom of each inflorescence. There were no significant differences in the mean numbers of adults weevils in the various positions, but there were significant differences in the mean number of adult weevils sampled in the various dates. (P=0.001). Microscopic examination of adult weevils indicate that nematodes are associated with the weevils and the spike lets. Results of this preliminary survey so far indicates that E. kamerunicus is a major insect pollinator of the oil palm in NIFOR oil Palm plantations. The association of these parasitic nematodes may have implication on their pollination efficiencies. Results of these findings will help in elucidating on one of the factors that govern pollination efficiency, percentage fruit set and the occurrence of seasonal peak in Fresh Fruit Bunches in Nigeria.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. TP684 P3I61 2003 Call Number
AGROVOC Term:	Elaeidobius kamerunicus
AGROVOC Term:	oil palm > oil palm Prefer using Elaeis guineensisElaeis guineensis
AGROVOC Term:	pollination
AGROVOC Term:	weevils > weevils Prefer using CurculionidaeCurculionidae
AGROVOC Term:	entomology
AGROVOC Term:	sampling
AGROVOC Term:	observation
AGROVOC Term:	pollinators
AGROVOC Term:	ecological factors
AGROVOC Term:	population dynamics
Geographical Term:	Malaysia
Depositing User:	Nor Hasnita Abdul Samat
Date Deposited:	04 Aug 2024 09:04
Last Modified:	04 Aug 2024 09:04
URI:	http://webagris.upm.edu.my/id/eprint/880

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