Preliminary observations on a field population of the oil palm-pollinating weevil Elaeidobius kamerunicus in Benin City, Nigeria

Aisagbonhi, C. I.; Kamarudin, Norman; Okwuagwu, C. O.; Wahid, Mohd Basri; Jackson, Trevor A.; Adaigbe, V. C.

doi:10.1079/ijt200431

Cited by 10 publications

(7 citation statements)

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“…Chenon (1981). They are also similar to those obtained by Mariau et al (1991) in West Africa at La Mé in Côte d'Ivoire and Aisagbonhi et al (2004) at Pobé in Benin and at Dibamba in Cameroon. Quantitatively, significant variation was observed from one species to another.…”

Section: Entomofauna Of Oil Palm Male Inflorescencessupporting

confidence: 91%

Entomofauna of Oil Palm Tree Inflorescences at La Mé Experimental Station (Côte d’Ivoire)

Koua

2012

AJEA

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Pollination of oil palm tree is mainly entomophilous. The inflorescences of this plant lodge many insects. The identification and quantification of these insects have proven ability to hold their pollination. The entomofauna of female and male inflorescences was inventoried and quantified at La Mé, a station of CNRA, the National Center of Agronomic Research of Côte d'Ivoire (West Africa) for a period of 2 years. The insects of the male inflorescences were listed at the beginning, the full and the end of anthesis on 1536 spikelets of 384 male inflorescences. For the insects of female inflorescences, 96 inflorescences were covered with a muslin sheath. The insects arriving on these inflorescences were captured in 2 days corresponding to anthesis length, during 10 minutes per hour, from 6 am to 6 pm. Species Elaeidobius sp., Microporum sp., Prosoestus sp. and Atheta burgeoni were common and regular present regardless of inflorescence type. Species Gabrius sp., Thrips sp., Anthocoride sp., Lithargus sp. and the bees (Nomia sp. and Apis mellifera) were rarely observed in female inflorescences. Elaeidobius kamerunicus and Prosoestus sp. were more abundant on the female than on the male inflorescences. The higher level of insects was observed in full anthesis on male inflorescences whereas among female inflorescences it was noted at the first day of flowering. Knowledge of the insect fauna of oil palm inflorescences according to different stages of flowering allows better management of pollination.

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Section: Entomofauna Of Oil Palm Male Inflorescencessupporting

confidence: 91%

Entomofauna of Oil Palm Tree Inflorescences at La Mé Experimental Station (Côte d’Ivoire)

Koua

2012

AJEA

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“…Les fortes humidités pourraient favoriser le développement des parasites ou des champignons entomopathogènes qui nuisent à l'insecte. En effet, l'espèce E. kamerunicus possède des ennemis naturels tels que le nématodes parasite Elaeolenchus parthenonema (Jackson et Bell, 2001 ;Poinar et al, 2002 ;Aisagbonhi et al, 2004 ;Zulkefli et al, 2011). Des conditions très humides pourraient ainsi favoriser le développement de ces ennemis naturels.…”

Section: Discussionunclassified

Influence du nombre d’inflorescences et de quelques facteurs climatiques sur l’abondance de <i>Elaeidobius kamerunicus</i> (Coleoptera: Curculionidae), principal pollinisateur du palmier à huile en Côte d’Ivoire

Kouakou¹,

Hala²,

Tuo³

et al. 2018

Int. J. Bio. Chem. Sci

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Chez le palmier à huile, le taux de nouaison des fruits est fortement lié à la densité des populations d'insectes pollinisateurs. Les populations du principal pollinisateur, Elaeidobius kamerunicus, ont été suivies dans le but d'identifier les facteurs influençant leurs fluctuations. Des prélèvements d'épillets ont été effectués sur les inflorescences mâles et des captures ont été réalisées sur les inflorescences femelles dans trois localités pendant 24 mois. Les résultats ont montré qu'à La Mé, le nombre d'inflorescences mâles influence positivement le nombre d'E. kamerunicus/épillet (r = 0,81 ; p ˂ 0,0001) et le nombre d'E. kamerunicus visitant les fleurs femelles (r = 0,77 ; p ˂ 0,0001). A Grand-Béréby, le nombre d'E. kamerunicus/épillet est corrélé négativement (r =-0,46 ; p = 0,027) avec le nombre de jours de pluies et positivement (r = 0,51; p = 0,012) avec l'insolation. A Iboké, les densités sur les inflorescences mâles et femelles sont influencées négativement par le nombre de jours de pluies (r =-0,45 ; p = 0,028 et r =-0,51 ; p = 0,027). Ainsi, l'abondance d'E. kamerunicus dans les plantations dépend en partie du nombre d'inflorescences mâles, de la pluie et de l'insolation.

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“…The oil palm pollinating weevil is dark brown to black and small with the average length size of the adult weevil is between 1.8 to 4.0 mm (O' Brien & Woodruff, 1986). Males have short rostrum, are hairier, having wing cases with small tubercles and are generally larger (3-4 mm), while the females have longer rostrum, less hair, absence of small tubercles on wing cases and smaller in size (2-3 mm) (Aisagbonhi et al, 2004;Kurniawan, 2010;Ayuningsih, 2013). The duration for the oil palm pollinating weevil to develop from an egg to larva I stage, followed by larva II, then larva III before forming a pupa, then becoming an adult, covers 10-25 days and the life span of the weevil is between 15-17 days (Syed et al, 1982;Herlinda, Pujiastuti, Adam, & Thalib, 2006;Meliala, 2008;Tuo, Koua, & Hala, 2011).…”

Section: Introductionmentioning

confidence: 99%

Morphometric Analysis of the Oil Palm Pollinating Weevil, Elaeidobius kamerunicus (Faust, 1878) (Coleoptera: Curculionidae) from Oil Palm Plantations in Malaysia

Nasir¹,

Mamat²,

Muneim³

et al. 2020

jers

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The pollinating weevil, Elaeidobius kamerunicus was introduced to Malaysia as an oil palm pollinator agent in 1981. After the introduction, the weevil has distributed widely in the oil palm plantation around Malaysia. This study aims to investigate the morphometric differences in Elaeidobius kamerunicus population within Malaysia, as well as from its originating country, Cameroon. A total of 540 weevils were collected from eight localities in Malaysia, and 60 from Cameroon, Africa. The five morphological measurements were taken ie. total body length (TL), elytra length (EL), pronotum length (PL), body width (BW) and the snout length (SL) using the Portable Capture Pro v2.1 Dinolite. The one-way ANOVA indicated significant differences amongst the five morphological characteristics between the weevil populations for both males and females from the eight localities (P < 0.05), respectively. For the male and female populations at different localities, the Principal Component Analysis explained 79.0% and 76.6%, respectively. Moreover, the Canonical Discriminant Function explained 95.5% and 90.2% of the variance for male and female population, respectively. Both the result of PCA and CDA conducted showed little variation between the eight localities for male and female weevil populations in Malaysia respectively. This study showed slight differences in morphometric characters for the weevil population in Malaysia.

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Preliminary observations on a field population of the oil palm-pollinating weevil Elaeidobius kamerunicus in Benin City, Nigeria

Cited by 10 publications

References 1 publication

Entomofauna of Oil Palm Tree Inflorescences at La Mé Experimental Station (Côte d’Ivoire)

Entomofauna of Oil Palm Tree Inflorescences at La Mé Experimental Station (Côte d’Ivoire)

Influence du nombre d’inflorescences et de quelques facteurs climatiques sur l’abondance de <i>Elaeidobius kamerunicus</i> (Coleoptera: Curculionidae), principal pollinisateur du palmier à huile en Côte d’Ivoire

Morphometric Analysis of the Oil Palm Pollinating Weevil, Elaeidobius kamerunicus (Faust, 1878) (Coleoptera: Curculionidae) from Oil Palm Plantations in Malaysia

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