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Journal of Agriculture and Biological Sciences Vol.2(7) pp.208 –213 December 2011.
Available online http://www.globalresearchjournals.org/?a=journal&id=jabs Copyright ©2011 Global Research Journals
Full Length Research.
Impact of terrestrial spraying of thiocyclam hydrogen oxalate on oil palm pollinating insects
By
Yalamoussa Tuo1, Akpa Alexandre Moise AKPESSE2, Nklo Hala3, Hervé K. Koua4
1UFR Biosciences, Laboratory of Zoology and Animal Biology; 22 BP: 587 Abidjan 22, E-mail: tuo_ya73@yahoo.fr
2UFR Biosciences, Laboratory of Zoology and Animal Biology; 22 BP: 587 Abidjan 22, E-mail: alexakpesse@yahoo.fr
3Centre National de Recherche Agronomique (CNRA) – 01 BP 1740 Abidjan 01, Côte d’Ivoire
E-mail: fnhala@yahoo.fr, Tél. +225 01 47 80 85
4Laboratory of Zoology and Animal Biology: University of Cocody, Abidjan (Côte d’Ivoire), 22 BP: 1611 Abidjan 22 (Côte d’Ivoire), E-mail: hervkoua@yahoo.fr, Tel: +225 08283619; Fax: +225 22502078
4Corresponding Author: E-mail: hervkoua@yahoo.fr Tel: +225 08283619; Fax: +225 22502078
Accepted 29th November 2011.
| Abstract |
The impact of terrestrial thiocyclam hydrogen oxalate (Evisect®) sprays an insecticide used against Coelaenomenodera lameensis the major pest of oil palm on pollinating insects was evaluated. Samples of pollinators were collected from both male and female oil palm inflorescences on untreated and treated plots. Means and standard deviations of the insects collected were compared by analysis of variance test and the post hoc Newman-Keuls. The results showed that insect populations of all species on female inflorescences (Elaeidobius kamerunicus, E. plagiatus, E. subvittatus, E. bilineatus, E. singularis, Microporum congolense, M. dispar, Prosoestus minor, P.sculptilis and Atheta Burgeoni) were significantly influenced by the spraying of Evisect® whilst the insects present on the male inflorescences were sensitive to the pesticide according to anthesis stages. In addition three of the four major pollinators of oil palm (E. kamerinicus, E. subvittatus, E. plagiatus and E. singularis) were sensitive to the chemical treatment by Evisect. The use of thiocyclam hydrogen oxalate to fight against oil palm pests reduces pollinating insect’s populations and can also harm good productivity.
Keys words: terrestrial spraying; thiocyclam hydrogen oxalate; Evisect®; oil palm; pollinating insects.