ELAEIDOBIUS KAMERUNICUS PDF

Elaeidobius kamerunicus Faust Coleoptera, Curculionidae is one of the specific pollinators on inflorescences of the African oil palm Elaeis guineensis Jacquin. This derelomine weevil is native to tropical Africa. During the late 20th century, it was introduced into all tropical regions where E. Despite an overall success, a decline in pollination efficiency has been documented in several regions.

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Skip to main content. Authors M. Hussein, N. Lajis, J. Abstract The weevil, Elaeidobius kamerunicus , was introduced into Malaysia in to improve pollination and increase fruit set. Yeild of fresh fruit bunches was increased following the introduction.

Weevil population density varies between localities and times of the year depending on certain extrinsic and intrinsic factors. This paper reports on the research to determine the weevil's biological and chemical system associated with the establishment of the insect in the new environment.

The net reproductive rate R o , intrinsic rate of natural increase r m , generation time T and doubling time DT were 3. Two species of bacteria, Serratia marcescens and Enterobacter cloacae were found infecting the larvae. Pupae were also infected by the same bacteria. The adult weevil is very host-specific to the oil palm, Elaeis guineensis and locate its host via a plant chemical called estragole 4-allylanisole.

Several analogues of estragole were bioassayed against the adults and only one, 4-methoxystyrene, showed positive response. High rate of increase, lack of effective natural enemies and high host specificity are the critical factors associated with the weevil's success. Citation Hussein, M. Acta Hortic. Facebook Careers YouTube.

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African oil palm weevil

Oil palm, Elaeis guineensis Jacq. This particular situation demands cross pollination, as both the inflorescences of the same plant are seldom simultaneously receptive. Pollination in oil palm is primarily by various means viz. Several species of insects are reported as natural pollinating agents, of which Elaeidobius kamerunicus is the predominant species. Introduction of this weevil increased fruit set from

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List of symptoms / signs

Skip to main content. Authors M. Hussein, N. Lajis, J. Abstract The weevil, Elaeidobius kamerunicus , was introduced into Malaysia in to improve pollination and increase fruit set. Yeild of fresh fruit bunches was increased following the introduction.

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Arecales: Arecaceae. In this experiment, the pollinating activity of E. Both male and female inflorescences emitted an anise-like fragrance. Female inflorescences appeared to reward the weevils with copious nectar production, whereas male inflorescences appeared to do so with both nectar and pollen. The number of weevils visiting an inflorescence was assessed by the use of a sticky trap encircling it, and by counting the weevils present on samples of spikelets of inflorescences. The weevil population peaked on the 3rd day of anthesis on male inflorescences, and on the 2nd day of anthesis on female inflorescences. Weevil activity recorded on the day of highest abundance during anthesis revealed an inactive period during —, substantial activity during —, and peak activity during —

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