TY - JOUR
T1 - État des lieux de la contamination des écosystèmes aquatiques par les pesticides organochlorés dans le Bassin cotonnier béninois
AU - Agbohessi, T.P.
AU - Toko, I.I.
AU - Kestemont, P.
N1 - Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/1/1
Y1 - 2012/1/1
N2 - Organochlorine pesticides were recommended in Benin in the 1960s (DDT, lindane, dieldrin, heptachlore, etc.) and from 1999 till 2007 (endosulfan) for the control of cotton plant devastators. Since the end of these periods, the illegal use of certain molecules of this family of pesticides has been observed in the cotton basin. Organochlorine molecules are very lipophilic and very persistent and quickly degrade under the effects of ultraviolet rays into by products which are generally more toxic and stabler than the initial compounds. When they are used in fields, they can still be found in the aquatic ecosystems several years later. A literature review showed the state of contamination in different Benin aquatic biotopes by these dangerous products. Indeed, alarming rates of endosulfan, DDT, dieldrin and heptachlor were found in certain waters, such as the waters of the park W. In sediments of Bétérou high levels of DDT, endosulfan and lindane were also revealed. An investigation of tilapia Sarotherodon melanotheron males captured along the Oueme river showed the presence of lindane, dieldrin, heptachlor, and pp'-TDE as well as a high plasmatic concentration of vitellogenin. Alarming rates of DDT, endosulfan, lindane and dieldrin were also found in Polypterus endlicheri captured in the waters of the Pendjari.
AB - Organochlorine pesticides were recommended in Benin in the 1960s (DDT, lindane, dieldrin, heptachlore, etc.) and from 1999 till 2007 (endosulfan) for the control of cotton plant devastators. Since the end of these periods, the illegal use of certain molecules of this family of pesticides has been observed in the cotton basin. Organochlorine molecules are very lipophilic and very persistent and quickly degrade under the effects of ultraviolet rays into by products which are generally more toxic and stabler than the initial compounds. When they are used in fields, they can still be found in the aquatic ecosystems several years later. A literature review showed the state of contamination in different Benin aquatic biotopes by these dangerous products. Indeed, alarming rates of endosulfan, DDT, dieldrin and heptachlor were found in certain waters, such as the waters of the park W. In sediments of Bétérou high levels of DDT, endosulfan and lindane were also revealed. An investigation of tilapia Sarotherodon melanotheron males captured along the Oueme river showed the presence of lindane, dieldrin, heptachlor, and pp'-TDE as well as a high plasmatic concentration of vitellogenin. Alarming rates of DDT, endosulfan, lindane and dieldrin were also found in Polypterus endlicheri captured in the waters of the Pendjari.
UR - http://www.scopus.com/inward/record.url?scp=84858249889&partnerID=8YFLogxK
U2 - 10.1684/agr.2012.0535
DO - 10.1684/agr.2012.0535
M3 - Article
AN - SCOPUS:84858249889
SN - 1166-7699
VL - 21
SP - 46
EP - 56
JO - Cahiers Agricultures
JF - Cahiers Agricultures
IS - 1
ER -