study was conducted to measure residues of pesticides in samples of Beans (Phaseolus vulgaris) collected in both field
and storage facilities in six local area councils of Borno State, northeast Nigeria. Multi-residue pesticide analysis technique
consisting of the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) sample preparation and GC-MS detection
was employed. Method validation for this study maintained a RSD ±13% and percentage recoveries were in the range of
80-110%. Results show that out of the residues of eight analytes determined, three analytes (Dichlorvos, Endrin and DDT)
were detected in both field samples (Pre Storage) and stored sample (post harvest). Another set of three analytes (Lindane,
Diazinon and Aldrin) were only detected in the pre storage samples, while the remaining two analytes (Carbofuran and
Dieldrin) were not detected at all. In general, the concentrations of these analytes in the bean samples are in the order:
Endrin > DDT > Dichlorvos. The study observed that Dichlorvos was mainly utilized in storage of beans from insect attack
and suggested that stringent monitoring of use of pesticides in agriculture and food storage in Nigeria is required.