Potential of Azadirachtin-D fraction against bacterial leaf blight disease in rice caused by Xanthomonas oryzae Pv. Oryzae

In the present study organic extracts (chloroform) of twenty four plants were tested through anti-bacterial susceptibility test against specific bacterium x. oryzae causing bacterial leaf blight (blb) disease in rice. azarditacha indica extract showed high efficacy against xoo bacterium forming larger inhibition zone (18.5 mm) with activity index (0.64).further extract of azarditacha indica fractionated,most active fraction were tested using bio autography agar overlay method against test bacterium,isolate,purify and characterized the most promising fraction and it's supposed to be 1-tigloyl-3-acetyl-1,1-hydroxymeliacarpin (azadirachtin-d).