Resistance Efficiency of Some Bacterial Isolates Against Malathion Pesticide

Chemical pesticides have an impact on other living organisms in addition to their intended target organisms. Any chemical pesticide is therefore made safe for use by examining its biological characteristics and side effects. The present study was aimed at determining the resistance efficiency of six bacterial isolates obtained from malathion-contaminated soils. Bacteria were isolated soil samples collected Adhamiya, Baghdad, Iraq. Biochemical tests VITEK 2 compact equipment used identify isolates. Primary secondary screening conducted against malathion pesticides. optimal growth conditions determined media. results demonstrated that 1, 3, 4, 8 grew best (100 mgL-1) mineral salt medium (MSM). Isolates 1 had a MIC 500 mgL-1, where they continued grow until seventh day incubation. Pseudomonas aeruginosa, putida, Aeromonas hydrophilia, Escherichia coli identified These showed test (temperature, incubation period, pH), indicating ability degrade malathion. highest average P. aeruginosa 35 °C 70.08 mm, while putida 40.10 mm during 7-day period. Also, values observed same bacteria pH 7, with value 26.98 mm. findings this reveal biodegrading