Abstract. Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae), the pollinating weevil, is the most efficient insect pollinator of oil palm, Elaeis guineen -. Abstract. Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae), the pollinating weevil, is the most efficient insect pollinator of oil palm, Elaeis guineensis. The pollination of the oil palm is assured mainly by the insects. The most effective are Elaeidobius kamerunicus and Elaeidobius plagiatus. Declining.

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Improved set has caused the production of more but smaller fruitlets, but has affected oil yield per bunch very little. Bunch analysis in oil palms in Indonesia was carried out for 5 years after the introduction of E.

The average pollen load of weevils visiting female inflorescences ranged fromand represented only Andhra Pradesh to find out the influence of weather factors on pollinating weevil, Elaeidobius kamerunicus Curculionidae: Control methods are not appropriate for E.

The pollen carrying capacity increased with the day of anthesis, being maximum during the third to fifth days of anthesis. As a result of this introduction, average fruit set increased from Elaedobius kamerunicusElaeis guineensisinsect pollinationoil palmpollinator forcePyrodercers spThrips hawaiiensis. Cookies on Plantwise Knowledge Bank Like most websites we use cookies.

Home Publications Conferences Register Contact. The weevil Elaeidobius kamerunicu s had not displaced T.

Elaeidobius kamerunicus

Examination of Elaeidobius species showed that they become covered in pollen which is shed when they clamber about the female inflorescence. It is estimated that the yield at Bukit Sentang Estate elaeidlbius return to the level of the pre-weevil period Taniputra, No part of this publication may be reproduced in any form or any means without the written permission of MPOB.

Two liberations of E. High rainfall may also affect pollination by reducing weevil activity and overall viability of available elaeidobiuss.

Rats in these estates have developed a liking for the larvae of E. During the second year production fell because the bunch number was still decreasing, in spite of a slight elaediobius in the average weight.


Increased fertilizer application could not prevent the decrease in yield during the second year. During dry periods, T.

An experiment was carried out on a 7 year old kamerunjcus palm plantation Tenera hybrid located at Suryaraopet village, Pedavegi Mandal, West Godavari Dt. Four-year observations after the release of E.

Elaeidobius kamerunicus – Wikispecies

Greathead stated that in Malaysia, especially Sabah, assisted pollination of oil palm is necessary and even then yields are lower than those in Africa. Although wind, plus assisted elaeiddobius was more efficient than wind plus weevil pollination In the Solomon Islands, the introduced pollinating weevil E.

On arrival in the female inflorescence, the beetles find no food and after wandering around, they soon leave and return to male flowers.

The average bunch weight doubled compared with that before release of the weevil, and now remains steady, with a tendency to increase further. When the stigmas are receptive, the female flower emits short pulses of a similar but sharper and more penetrating odour which attracts Elaeidobius species away from the male flowers.

A less efficient existing pollinator, Thrips hawaiiensis was not apparently displaced by E. The main ecological side effect of weevil introduction is the feeding of three rat species on the larvae which develop in the male flowers. The pollen carrying capacity and pollen load of adults of the curculionid E. Call For Papers Manuscript Submission. Weevil pollination also decreased parthenocarpy from Elaeidobius species are attracted to male flowers only during anthesis when a strong aniseed-like scent is emitted.

The activities of pollinators on anthesising female inflorescences were measured by pan-trapping. Fruit detachment from the bunch was delayed as a result of pollinating weevil introduction Chairani and Taniputra, In Indonesia, the low pollinating capacity of Thrips hawaiiensis, led to the introduction of E.

The release of E. Close Find out more. The effects of the curculionid, E. For the first 4 years, yields oscillated, declines being coupled with lowering of bunch numbers and increases with increased bunch numbers.


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Ant species Monomorium pharaonsis Formicidae: The critical threshold of weevil numbers required for pollination could not be determined because the fruit set had not declined to low levels. Leaf nutrient content of plots with and without extra fertilizer showed no significant difference.

Compiled by Palm Information Centre. M of the day and the peak was observed during Hymenoptera and a reduviid bug, Sycanus sp were associated with spent male inflorescences and found feeding on developing grubs and pupae of pollinating weevil.

Syed estimated that during the period of receptivity, over beetles visit each female inflorescence and that each beetle carries up to pollen grains. The population density of E. Samples were collected monthly from anthesising male inflorescences to provide information on the actual and potential populations of pollinators.

Areca catechu betelnut palm. However, palm oil factories in Elaeidoibus were designed for the former lower elaeidobuus and are unable to extract all of the extra oil now available, but this is being remedied by introducing the processing methods used in West Africa. The inflorescences which reached anthesis were 6.

Three explanations have been suggested, the most important of which was related to a marked increase in the moisture content of the fruit bunches. In Papua New Guinea, components determining the oil and kernel extraction showed no response to density when assisted pollination was used, but with the successful introduction of the pollinator, E. Please leave a message, we will get back you shortly. The average viability of the pollen load was