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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The inflorescences which reached anthesis were 6.
In Africa, the curculionids E. An increase in rat damage, particularly to rotting male flowers, was noted following weevil introduction Hutauruk ellaeidobius Ps, October, November and December months were found to be ideal for the development of the weevil.
African oil palm weevil (Elaeidobius kamerunicus)
However, during their first few years, young oil palms produce primarily female flowers, only producing sufficient male flowers for the establishment and effective activity of pollination insects from the age of months.
The weevils are extremely beneficial and have been used by man, through introduction to palm plantations, for the pollination of these palms. Oviposition takes place after anthesis so that the larvae develop on tissue which has served its purpose and no longer has any function for the palm and, therefore, Elaeidobius species cause no significant damage.
No weevils were found developing during May 4 th week to June 2 nd week. Bacillus thuringiensis strains Eelaeidobius and HD-7 were found to be safer.
In the Solomon Islands, the introduced pollinating weevil E. Compiled by Palm Information Centre. African oil palm weevil Elaeidobius kamerunicus.
Call For Papers Manuscript Submission. In field studies at the Bukit Sentang Estate in Sumatra, Indonesia, the yield of fresh fruit bunches increased in the first year after the release of E. One explanation was that in selecting for more female flowers, plant breeders had produced varieties with insufficient male flowers or with less viable pollen. Publication Policies and Ethics.
The pollen carrying capacity of males was significantly greater than that of females, which was partially due to the greater surface area of males and especially the presence of pleural setae. A less efficient existing pollinator, Thrips hawaiiensis was not apparently displaced by E.
Rats in these kamerunicis have developed a liking for the larvae of E.
African oil palm weevil
In these countries, the inadequacy of pollination has been a major problem. Knowledge Bank home Change location.
When the weevils crawl over the male elaeidboius a large amount of pollen grains are dispersed which are carried by wind Ponnamma et al. During dry periods, T. Syed elaeidoobius that during the period of receptivity, over beetles visit each female inflorescence and that each beetle carries up to pollen grains. Weevil pollination also decreased parthenocarpy from As a result of this introduction, average fruit set increased from Agri and Aquaculture Journals Dr.
The average viability of the pollen load kamdrunicus Of the various species of this genus studied in Cameroon, E. Their pollination activities had sustained the fruit set and fruit to bunch ratios about 60 per cent. During the period after the introduction of the weevil into Malaysia, there was no significant change on bunch parameters, with one exception: Fruit detachment from the bunch was delayed as a result of pollinating weevil introduction Chairani and Taniputra, Can’t read the image?
Hymenoptera and a reduviid bug, Sycanus sp were associated with spent male inflorescences and found feeding on developing grubs and pupae of pollinating weevil.
There was no significant effect on mesocarp, shell and kernel, but fruits tended to become elaeodobius and bunches more compact. The effects of the curculionid, E. The change in numbers of fruit set affects the harvesting standards used for optimizing oil production, as these are based on numbers of loose fruits.