SAYED MOHAMMAD MOHSIN1*, SHAHRAN AHMED NAYEM1 and PRETOM KUMAR HORE2
1Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207 and 2Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.
*Corresponding author’s Email: mohsinsau.ac@gmail.com
ABSTRACT
The study was conducted at the Molecular Plant Pathology Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during 15 November to 15 February, 2015 to find out suitable antibacterial chemicals against Ralstonia solanacearum. The experiment was carried out in Net house of Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. Bacterial wilt of tomato is a century old devastating disease caused by the bacteria Ralstonia solanacearum. Five chemicals viz: Bleaching powder, Streptomycin, Neomycin, Bactrol and Copperoxychloride were tested both in-vitro and in-vivo against the causal organism. The treatments are T0 = Control (Water), T1=Bleaching powder, T2=Streptomycin, T3=Neomycin, T4=Bactrol and T5= Copperoxychloride. Among the chemicals bleaching powder showed best performance against the causal organism while Streptomycin, neomycin and Bactrol showed moderate performance. However, Copperoxychloride did not show any effect against Ralstonia solanacearum. In-vitro highest inhibition zone was recorded when bleaching powder used against R. solanacearum where’s Streptomycin, Neomycin and Bactrol showed moderate inhibition zone. Moreover, Copperoxychloride did not show any inhibition. In field condition, highest incidence and lowest yield were recorded in control and Copperoxychloride treatments. At the same time the bleaching powder treatment provided effective disease control. Treatment with bleaching powder resulted in the lowest incidence and highest yield while treatment with Streptomycin, Neomycin and Bactrol resulted in the moderate incidence and yield. Besides Bleaching powder provided highest suppression of plant infection compared with other treatments. The results supported that the use of bleaching powder was more effective and suitable than the other treatments for the management of bacterial wilt in infested soils.
Keywords: Bacteria, Wilt, Streptomycin, Neomycin and Bactrol.