Evaluation of Resistance of Phytopathogenic Bacteria to Agricultural Antibiotics

Agricultural antibiotics are widely used to inhibit the growth of phytopathogenic bacteria involved in plant diseases. However, continuous antibiotic overuse crop production may lead development resistance bacteria. This study was conducted evaluate three different agricultural (oxytetracycline+streptomycin, streptomycin, and validamycin A) 91 strains including <i>Pectobacterium carotovorum</i>, <i>Pseudomonas syringae</i> pv. <i>actinidiae</i>, <i>Clavibacter michiganensis</i> subsp. <i>michiganensis</i>, <i>C. <i>capsici</i>, <i>Xanthomonas arboricola</i> <i>pruni</i>. Bacterial presence various concentrations A also assessed spectrophotometrically by analyzing optical density. All did not grow when cells were exposed oxytetracycline+streptomycin or 100× streptomycin. among strains, 4% 2% showed bacterial at 1× 10× respectively. Furthermore, 97%, 93%, 73% resistant 1×, 10×, A, respectively, especially, <i>P. carotovorum</i> contained highest A. Minimum bactericidal concentration values correlate with patterns resistance. Further studies needed understand incidence