Evaluation of different antibacterial antibiotics against bacterial blight of soybean caused by Pseudomonas syringae pv. glycinea under field conditions.

摘要

Field experiments were carried out in Parbhani, Maharashtra, India, during 2009-10, to investigate the efficacy of some antibiotics against bacterial blight of soyabean, caused by P. syringae pv. glycinea [ P. savastanoi pv. glycinea]. The treatments comprised T1-streptocycline (100 ppm)+copper oxychloride (0.25%), T2-streptocycline (100 ppm), T3-2 bromo 2 nitro propene 1-3 diol (500 ppm), T4-copper oxychloride (0.25%), T5-poushamycin (200 ppm), and T6-control. Observations on the disease incidence and severity were recorded at 30, 45 and 60 days after sowing (DAS). T1 recorded the highest seed yield (2605 kg/ha) and test weight (14.33 g), with minimum mean disease intensity of 12.74% and mean pod infection of 4.22%. The next best treatment was T2, which recorded seed yield of 2505 kg/ha and test weight of 14.00 g, with mean disease intensity of 17.42% and mean pod infection of 5.22%. This was followed by T4, T3 and T5, with seed yield of 2406, 2248 and 2205 kg/ha; test weight of 13.50, 13.16 and 13.11 g; mean disease intensity of 28.15, 22.49 and 35.51%; and mean pod infection of 8.24, 12.90 and 13.10%, respectively.