Nematicidal effect of bacillus thuringiensis on trichostrongylus colubriformis [nematode]

The lethal effect of Bacillus thuringiensis [B.T.] var kurstaki and its toxin on eggs and larvae of Trichostrongylus colubriformis was studied. The ovicidal and larvicidal activities were higher with prolonged exposure of parasitic eggs and larvae to the bacteria and its toxin. The ovicidal activities of the bacteria and toxin were increased to be 93.71% and 93.66% respectively at 2.5 mg concentration. The larvicidal effects of bacteria reached lo 100% and 98% for toxin at 2 mg. Also the anthelmintic activity of B.T. kurstaki against T. colubriformis in rabbit was proved to be helpful