Bacterial wilt of brinjal caused by Ralstonia solanacearum, considered as a destructive disease of brinjal crop. An experiment was conducted to test the effectiveness of plant oils and antibiotics against the growth of Ralstonia solanacearum under in vitro conditions in the Department of Plant Pathology, Odisha University of Agriculture and Technology, Bhubaneswar during 2021-2022. However eight different plant oils were tested. Among them, the maximum inhibition was observed in clove oil (15.47 mm) followed by linseed oil (14.53 mm). The antibiotics Streptocycline (12.57 mm) showed the considerably highest inhibition when tested against R. solanacearum, followed by Gentamycin (10.46mm), Ampicillin (9.12 mm), Cefuroxime (8.73 mm), and Chloramphenicol (8.66 mm),Levofloxacin (8.32 mm), Tetracycline (8.11 mm) and Ciprofloxacin showed (7.98 mm) were statistically at par.

Antibiotics, inhibition, plant oils and Ralstonia solanacearum

The effect of eight different plant oils on R. solanacearum revealed that maximum inhibition was observed in clove oil (15.47 mm) followed by linseed oil (14.53 mm). Huang and Lakshman, (2010) also observed that clove oil showed maximum inhibition against R. solanacearum. Kumari et al. (2021) also observed that Streptocycline exhibited highest inhibition zone of 28.03 mm at 500 ppm concentration. Singh and Jagtap (2017) also recorded that Streptocycline showed highest inhibition zoneof 18.4 mm and 21.7 mm at 400 and 500 ppm respectively (Murthy and Srinivas 2012; Raghu et al., 2013 and Gupta and Razdan 2013).

D. Sabina Mary, G.S. Sahu, Gayatri Biswal, A.K. Senapati and K.C. Samal (2022). Inhibitory effect of plant oils and antibiotics against Ralstonia solanacearum. Biological Forum – An International Journal, 14(4a): 586-590.