Influence of bean common mosaic virus infection on chlorophyll content and primary productivity in hyacinth bean (dolichos lablab L.)

Dolichos lablab L. crop is infected by bean common mosaic virus. This included crinkling and rolling of leaves. Leaves usually have an irregular mosaic pattern of light yellow and green areas were observed. Experiment was conducted to find out the influence of bean common mosaic virus on the chlorophyll content and primary productivity in healthy and diseased hyacinth bean plant at different intervals 15th, 30th, 45th, 60th and 75th days. The chlorophyll ‘a’, chlorophyll ‘b’ and total chlorophyll contents were always lesser in the leaves of infected plants as compared to healthy ones. The chlorophyll content estimated on per gram basis increased with age of the plants irrespective of infection. Primary productivity of diseased plants was reduced with corresponding decrease in the net production. Respiration rate in Hyacinth bean leaves infected with the virus was always more than their comparable healthy samples.