Spatio-temporal distribution of the infestations of </i>Coelaenomenodera lameensis</i> Berti and Mariau (<i>Coleoptera, Chrysomelidae</i>) an oil palm tree (<i>Elaeis guineensis</i> Jacq.) pest in Toumanguié (Côte d’Ivoire)

Abstract

Spatio-temporal distribution of Coelaenomenodera lameensis Berti and Mariau, 1999, pest of palm oil tree (Elaeis guineensis Jacquin, 1963) was carried out on 1226 ha of an industrial plantation at Toumanguié (south-east of Côte d'Ivoire). Temporal distribution of population established the existence, according to the years, of favorable periods of Coelaenomenodera lameensis infestations. Eight peaks of infestation were observed during 24 months. Infestation cycles proceeds each 90 days. Spatial distribution of the infestations revealed experimental plots having recorded between 0 and 8 months of infestation during the 2 years of investigation. This distribution proved to be independent of the age of the plots. Infestations were also independent of abiotic factors (rainfall, temperature and relative humidity). Larvae at stages 1, 2, 3 and 4 are mostly responsible of the damages observed in the fields.

Study of some biological parameters of the oil palm tree leaf miner, Coelaenomenodera lameensis (Coleoptera: Chrysomelidae, Hispinae) in a semi-controlled environment

“…In C. lameensis, the larva, nymph and internal adult live in galleries and each gallery may contain one or more individuals. This same observation was made by Koua et al (2010), Tano (2012) and Konan et al (2014) in this same insect. Similar results were obtained in Javeta pallida, with the difference that in this beetle, there is generally only one individual (larva or nymph or adult) per gallery, rarely more (Shameem et al, 2016).…”

“…However, oil palm cultivation is facing attacks from many pests including Coelaenomenodera lameensis, (Coleoptera: Chrysomelidae, Hispinae) which is the most formidable insect pest in West Africa and particularly in Côte d'Ivoire (Koua et al, 2010;Tano, 2012;Akpesse et al, 2015). Its damage can cause a drop in production of 30 to 50% over a period of 2 to 3 years (Mariau, 2001;Tano et al, 2013).…”