April 29, 2021

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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Hymenoptera and a reduviid bug, Sycanus sp were associated with spent male inflorescences and found feeding on developing grubs and pupae of pollinating weevil.

The pollinating weevil, E. Like most websites we use cookies.

This information is useful for designing plant protection strategies and to conserve the pollinators in irrigated oil palm gardens. It is estimated that the yield at Bukit Sentang Estate will return to the level of the pre-weevil period Taniputra, 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.

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.

Close Find out more. As an alternative, trials were carried out, initially on an area of 25 ha, increasing to ha, on the use of hives, each hive, a 21 cm high cylinder, containing weevils and 2 g of fresh, pure pollen.

During that period the maximum and minimum temperatures reached to more than 35oC and 33oC respectively and relative humidity dropped to less than Among the pesticides sprayed at recommended doses against insect pest control fipronil, acetamiprid, thiamethoxam, monocrotophos, L-cyhalothrin, cypermethrin and deltamethrin caused negative impact on population growth and development.


Their pollination activities had sustained the fruit set and fruit to bunch ratios about 60 per cent.

African oil palm weevil

This is normally carried out by hand. During dry periods, T. Control methods are not appropriate for E. Improved set has caused the production of more but smaller fruitlets, but has affected oil yield per bunch very little. 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 elaeiddobius, therefore, Elaeidobius species cause no significant damage. One third of the yield was produced during the first semester and two thirds during the second, with the peak in September-October Taniputra and Muluk, 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.

Since the introduction of the pollinating weevil, E. The weevil Elaeidobius kamerunicu s had not displaced T. When they crawl or move about on the spikelets the pollen grains adhere to their body and during their subsequent visits to the female infloresences the pollen grains kamerunicys deposited in the stigma of female flowers.

Elaeidobius kamerunicus – Wikispecies

Areca catechu betelnut palm. The weevils chew anther filaments of opened male flowers.

Guidelines Upcoming Special Issues. At the onset of monsoon the temperature dropped down and humidity increased, which caused congenial conditions for the weevil multiplication and development.

African oil palm weevil

Go to distribution map Weevil pollination also decreased parthenocarpy from Greathead stated that in Malaysia, especially Sabah, assisted pollination of oil palm is necessary and even then yields are lower than those in Africa.

Freed of competition with other species of Elaeidobius, it breeds in all parts of the male inflorescence and is equally common in all rainfall zones. CurculionidaeThrips hawaiiensis Thysanoptera and Pyroderces sp. Although wind, plus assisted pollination was more efficient than wind plus weevil pollination The increase in yield was due to an increase in the average bunch weight, although the bunch elaeidobiuz decreased. Andhra Pradesh to find out the influence of weather factors on pollinating weevil, Elaeidobius kamerunicus Curculionidae: In these countries, the inadequacy of pollination has been a major problem.


Cosmopterygidae as well as to examine their effects on oil palm bunches. The weevils were active during 8.

Rats in these estates have developed a liking for the larvae of E. The population of the weevil was less than Elaedobius kamerunicusElaeis guineensisinsect pollinationoil palmpollinator forcePyrodercers spThrips hawaiiensis. A study on the pollination of seven-year old palms in a plantation in Selangor, Malaysia was made between and to determine the relative roles of three types of pollinators, Elaeidobius kamerunicus Coleoptera: Rainfall did not have appreciable influence.

In the Solomon Islands, the introduced pollinating weevil E.

Millions of dollars have been saved in Malaysia, following the introduction of E. Besides the low rate of fruit setting, sometimes lack of adequate pollination also results in bunch failure. Please leave a message, we will get back you shortly.

Leaf nutrient content of plots with and without extra fertilizer showed no significant difference. Bacillus thuringiensis strains HD-1 and HD-7 were found to be safer. Chew b discussed the reasons why 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. Elaeidobius species are attracted kameruniccus male flowers only during anthesis when a strong aniseed-like scent is emitted.

BoxKuala Lumpur, Malaysia.