Authors:
Boubacar Madio dit Aladiogo MAIGA*, Amadou MAIGA
, Ibrahima KONE
, Kalifa TOURE
, Fatoumata
YARO5
and Adama TOLOFOUDYE,Mali |
Abstract:
The cotton production in Mali is made with a massive use of fertilizers and pesticides. This use
of pesticides against cotton pests raises questions about the level of pollution of the environment
in general and the groundwater from the cotton basin of Mali in particular. The study consists of
sampling shallow ground water from two areas, each considered vulnerable to ground water
contamination from agricultural chemicals. It carried out in the regions of Koulikoro and
Sikasso, then consisted of a search for residues of four organochlorine pesticides (DDT, dieldrin,
endosulfan ? and lindane) and one pyrethrinoid (deltamethrin) in the well water. Five sampling
sites (Kassela, Koumantou, Ouelessebougou, Sido and Tienfala) were explored. Two collection
seasons were carried out in September 2016 (S1) and September 2017 (S2). They involved a
total of 104 well water samples divided into 78 wells without margins and 26 wells with
margins. The samples were extracted and analyzed by a gas chromatograph equipped with an
Electron Capture Detector. The results show the presence of pesticide residues at measurable
concentration for 80 of the 104 wells from the five sites. Pesticides residues were determined in
76.92% of the samples. The pesticide with the highest detection frequency was Deltamethrin
which was detected in 20 of the 80 contaminated wells |
