POTENTIAL OF RIZOBACTERIAL CONSORTIUM FOR THE CONTROL OF BACTERIAL LEAF
BLIGHT DISEASES BY Xanthomonas oryzae pv. oryzae
ON RICE PLANT IN THE FIELD
YM Gusrisan, Darnetty dan H Rahma*
Program Studi Proteksi Tanaman Fakultas Pertanian Universitas Andalas Sumatera Barat
Korespondensi : Alamat email ini dilindungi dari robot spam. Anda memerlukan Javascript yang aktif untuk melihatnya.
Diterima / Disetujui
ABSTRACT
Bacterial leaf blight (BLB) disease caused by Xanthomonas oryzae pv.oryzae (Xoo) is important in rice plants. The use of biological agents such as rhizobacteria as an inducer of plant resistance is an alternative that can use to control bacterial leaf blight. The purpose of this study was to obtain a consortium of rhizobacteria that can control BLB disease in rice plants in the field. This research is an experimental study using a Randomized Block Design, consisting of 7 treatments and three groups. The treatments consisted of consortium of S. pavanii KJKB 5.4 + B. cereus AJ 3.4; S. maltophilia LMTSA 5.4 + B. cereus AJ 3.4; S. pavanii KJKB 5.4 + S. maltophilia LMTSA 5.4 + B. cereus AJ 3.4; Positif Control (Not treated); Negative control (inoculated with Xoo); and Streptomycin Sulfate 0.2%. The rhizobacteria consortium was introduced two times, namely in the seed and seedling phase before transplanting. Furthermore, Xoo bacteria were inoculated when the rice plants were 45 DAP using the leaf-clipping method. The results showed that the consortium of S.pavanii KJKB 5.4 + S.malthophilia LMTSA 5.4 + B.cereus AJ 3.4) could suppress BLB disease in rice plants in the field with an incubation period of 4.89 days after inoculation with an effectiveness of 91.76% and a disease severity value 12.23% with effectiveness 56.02%.
Key words : Consortium, rhizobacteria, rice, Xanthomonas oryzae pv. Oryzae
