Dept. of Plant Pathology, Indira Gandhi Agricultural University, Raipur-492006.
Abstracts of Research Papers Presented during the National Symposium of Indian Virological Society at Unit of Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi-110 012, October 14–1.
Bud blight caused by Peanut bud necrosis virus (PBNV) is an important disease of soybean (Glycine max L. Merr) in the Chhattisgarh region of Central India. It is becoming a serious problem in soybean-cultivated area and observed 10–20% incidence with the 70–90% yield loss per plant.
A field experiment was conducted at IGAU research farm during Kharif season 2003–04 in split plot Design with four date of sowing i.e. 30.6.03 (D1), 10.7.03 (D2), 20.7.03 (D3) and 30.7.03 (D4) in the main plot and four varieties i.e. JS 335 (V1), PK 472 (V2), JS-80-21 (V3) and Kuber (V4) in the sub plot were taken as treatments. Observations on incidence of bud blight and other ancillary characters i.e. height, branch, nodules, pods and root biomass were recorded after 75 days after sowing. Bud blight incidence was significantly less (6.27%) in late sown crop followed by D2 (7.67%) and D3 (7.77%). Maximum disease incidence (15.86%) was recorded in D1 (30.6.03). Among the varieties, JS 80–21 showed significantly less disease (5.92) followed by Kuber. Maximum disease incidence was recorded in var., PK-472 (15.12%). Plant height, No. of pods, No. of nodules, Fresh and dry root biomass were severely affected by bud blight as compared to healthy plants. Maximum per cent reduction in plant height was exhibited by Kuber (32.0) followed by JS-335 (30.567%). Maximum per cent reduction in branch, number of nodules, number of pods, fresh and dry biomass per plants were recorded in var.- JS21 (47.03%), PK-472 (53.07%), Kuber (55.01%) and JS 335 (44.57% & 42.07%) respectively. Minimum per cent reduction in branch, number of nodules, numbers of pods, fresh and dry biomass per plants were found in Kuber (32.44%), JS 80–21 (44.47%), PK-472 (42.00%), PK-472 (27.94%) and Kuber (26.86%), respectively.
