In-vitro efficacy antibiotics amongst the isolates of Xanthomonas axonopodis pv. citri

Five antibiotics viz. Streptomycin sulphate, Streptocyclin, Chloramphenicol, Ampicillin and Rifamycin and One fungicide viz. Copper-Oxychloride were tested against Xanthomonas axonopodis pv Citri. in vitro. The antibiotic sensitivity against sixteen isolates was studied by paper disk method. Streptomycine sulphate (500ppm) was significantly superior over other treatments with maximum inhibition zone in all Sixteen isolates of Xanthomonas axonopodis pv citri.