Studies on the tolerance of soybean (Glycine max,/i> (l.) Merrill) to Bean Pod Mottle Virus (BPMV) (genus Comovirus) in humid tropical zone of Nigeria

Abstract

The reaction of twenty soybean varieties to inoculation with Bean Pod Mottle Virus (BPMV) (Genus comovirus) was studied for two consecutive years both in the field and in the greenhouse. Randomized Complete Block Design (RCBD) with three replications was used for the field studies while completely Randomized Design (CRD) with three replications was used for the greenhouse studies. The tolerance of soybean varieties to BPMV was investigated using Bean Leaf Beetle (Cerotoma trifurcata) and Gross Wounding Inoculation Technique (GWIT). The twenty soybean varieties studied differed significantly (P = 0.05) in the incidence and disease severity ratings of BPMV disease. TGX 1835-3E produced the highest (73.8%) incidence, while TGX 1864-25F gave the lowest (8.80%) incidence of BPMV disease in the field. TGX 1875-2E had the highest (3.9) disease severity rating of BPMV while TGX 1843-3E and TGX 1448-1E had the lowest (2.3 each) rating. BPMV was transmitted to soybean varieties by Gross Wounding Inoculation Technique (GWIT) (61.7%) and by bean leaf beetle (Cerotoma trifurcata) (51.5%).

Keywords: Bean leaf beetle, Gross wounding inoculation technique, Transmission, Incidence, Bean pod mottle virus

Plant Product Research Journal Vol. 12 2008: pp. 14-18