Bio-physical and bio-chemical factors influencing plant resistance in pod borers on field bean, Lablab purpureus var. lignosus Medikus

Field incidence of pod borers viz., Maruca vitrata and Sphenarches caffer were evaluated in 84 entries of field bean. Physical and chemical constituents of 10 selected entries were determined to establish relationship of the factors on incidence of pod damages. Studies revealed that highly susceptible cultivar AVT-FB(80)15-6-4 had highest amount of protein (28.9%), reducing sugar (1.72 mg g⁻¹) as compared to tolerant cultivar TCR-137 which had 19.8%, 1.05, respectively. A significant positive correlation were existed between protein and reducing sugars with pod damage whereas negative correlation prevailed between silica and crude fibre contents with pod damage.