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 pollinating weevil, E. 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. The average viability of the pollen load was High fresh fruit bunch yields in resulted in the production of a low crop innumbers of bunches being lower, although bunch size was still high. Three explanations have been suggested, the most important of which was related to a marked increase in the moisture content of the fruit bunches Keywords: Rainfall did not have appreciable influence.

File:Elaeidobius – Wikipedia

Elaedobius kamerunicusElaeis guineensisinsect pollinationoil palmpollinator forcePyrodercers spThrips hawaiiensis. The main ecological side effect of weevil introduction is the feeding of three rat species on the larvae which develop in the male flowers.

Samples were collected monthly from anthesising male inflorescences to provide information on the actual and potential populations of pollinators. The population of the weevil was less than The pollen carrying capacity increased with the day of anthesis, being maximum during the third to fifth days of anthesis.

Elaeidobius species are attracted to male flowers only during anthesis when a strong aniseed-like scent is emitted. In Africa, the curculionids E. The weevils are extremely beneficial and have been used by man, through introduction to palm plantations, for the pollination of these palms.


Increased fertilizer application could not prevent the decrease in yield during the second year. Journal of Oil Palm Research Vol. When the weevils crawl over the male inflorescences a large amount of pollen grains are dispersed which are carried by wind Ponnamma et al.

African oil palm weevil

Please leave a message, we will get back you shortly. It appeared that the weevil did not change the monthly yield pattern.

Go to distribution map All anthesising female inflorescences at kamerunifus time of population sampling were marked and the fruit bunches which formed were later harvested for analysis. The increase in yield was due to an increase in the average bunch weight, although the bunch number decreased.

There was also a steady build-up of R. The inflorescences which reached anthesis were 6. The correlation between weevil activity and weather parameters viz.

African oil palm weevil Elaeidobius kamerunicus. Since the introduction of E. Syed estimated that during the period of receptivity, over beetles visit each female kamerunicuw and that each kamerunifus carries up to pollen grains. Harvesting all bunches in which kammerunicus detachment had commenced every days gave optimum oil production Wood, The pollen carrying capacity was inversely proportional to the weevil population per spikelet, too high weevil populations resulted in reduced pollinating efficiency, presumably due to intraspecific competition.

The pollen carrying capacity and pollen load of adults of the curculionid E. Ann Jose ankara escort. 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.

Yield increases following the introduction of E. 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.


Elaeidobius kamerunicus – Wikispecies

Chew b discussed the reasons why E. Rats in these estates have developed a liking for the larvae of E. Ablation or disbudding of oil palm at the immature stage is commonly practised in Malaysia on the assumption that more nutrient will be channelled for vegetative growth, and in order to prevent rotting of the poorly pollinated early bunches. Leaf nutrient content of plots with and without extra fertilizer showed no significant difference. This is to ensure that we give you the best experience possible.

Compiled by Palm Information Centre. Bacillus thuringiensis strains HD-1 and HD-7 were found to be safer. Although wind, plus assisted pollination was more efficient kqmerunicus wind plus weevil pollination As the yield at Bukit Sentang estate has now returned to the level of the pre-weevil period, it is concluded that it takes 5 years for the oil palm to adjust to kamerinicus change in pollination system Taniputra and Muluk, The weevils chew anther filaments kamerunicis opened male flowers.

File:Elaeidobius kamerunicus.jpg

One third of the yield was produced during the kamerknicus semester and two thirds during the second, with the peak in September-October Taniputra and Muluk, The main rat species in the oil palm estates, R.

Control methods are not appropriate for E. Furthermore, a high population was not necessarily beneficial because it resulted in the lowering of fruit set.