Bioaccumulation Of Herbicide, Butachlor® In Bean Leaves At 6 Weeks After Application At Pre-Emergence
Journal Title: IOSR Journal of Pharmacy and Biological Sciences (IOSR-JPBS) - Year 2018, Vol 13, Issue 3
Abstract
The over-use and/or indiscriminate application of herbicides by most rural farmers in Nigeria are major factors that contribute to bioaccumulation of chemical agents and environmental contamination in the society. Butachlor® (N-butoxymethyl-2-chloro-2, 6-diethylacetamide), a systemic herbicide is widely used to control weeds in different parts of Nigeria.Bioaccumulation of the herbicide,butachlor® in beans (Phaseolus vulgaris) leaves was evaluated at 6 weeks following cultivation of the crops and application of the herbicide at pre-emergence.A normal or recommended concentration of 260 mg/m2 of the herbicide, anda 12% and 24% increase (290 and 320 mg/m2 respectively) above the normal concentration were separately applied to the experimental legume crops planted in different plots. Gas chromatography and mass spectrometry (GC-MS) were used to determine the presence and also the concentration of bioaccumulatedherbicide in the cultivated bean leaves at6 weeks. The control beans without exposure to herbicide had no trace of butachlor® detected in the leaves but the test beans which were treated with 260mg/m2 (recommended concentration) had 0.10 ppm while 290 and 320 mg/m2 induced a correspondingly increased bioaccumulation value of 0.13 and 0.20ppm.Butachlor® was found to havebioaccumulated minimally in beans forages at 6 weeks but the herbicide residues became accumulated with increased use of concentrations above the recommended application rate.
Authors and Affiliations
Enefe, Ndidi G, Ubani, Chibuike S. , 3Onwurah Ikechukwun. E, Ode, Julius O
Keywords
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- EP ID EP395418
- DOI 10.9790/3008-1303048187
- Views 84
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