Int.J.Curr.Microbiol.App.Sci (2020) 9(6): 3894-3905 3894 Review Article https://doi.org/10.20546/ijcmas.2020.906.459 The Morphological and Biochemical Components of Resistance in Field Bean against Pod Borers K.M. Rashmi 1 , K.N. Muniswamy Gowda 2 , B. Tambat 2 , N. Umashankar Kumar 2 and L. Vijayakumar 1 1 College of Agriculture, VC form Mandya, India 2 College of Agriculture, Karekere, Hassan-573 225 *Corresponding author ABSTRACT Introduction Lablab purpureus (L.), commonly called as field bean is one of the ancient leguminous crops cultivated mainly in southern parts of India. Though the crop is cultivated in almost all regions of Karnataka, it is highly grown as a mixed crop with finger millet and sorghum and to a smaller extent as a pure crop under rainfed as well as irrigated conditions. The damage by insect pests is considered as one of the major drawbacks in achieving the potential yield in field bean. Several of pests severely ravage the buds, flowers and developing seeds of bean crop resulting in crop loss. Govindan (1974) reported around 55 species of insects and one species of mite feeding on crop from seedling stage to harvest in Karnataka. International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 6 (2020) Journal homepage: http://www.ijcmas.com The morphological characters viz., pod length, pod width, pod wall thickness and trichome density in selected genotypes were studied and the correlation studies revealed that pod length showed positive correlation (r = 0.90) with pod damage. However, pod width showed non-significant association (r = 0.34) with the pod damage. While, pod trichome density and pod wall thickness (r = -0.89 & -0.88, respectively) showed significant negative association with pod damage. The biochemical basis of resistance to pod borers in field bean genotypes revealed, the total phenols in pods of healthy and infested samples (r= - 0.92 & -0.95, respectively) showed a significant and negative relationship with per cent pod damage caused by pod borers. While, total sugars in healthy and infested pods (r = 091 & 0.94, respectively), reducing sugars in healthy and infested pods (r = 0.89 & 0.92, respectively), crude proteins in healthy and infested pods (r = 0.90 & 0.96, respectively) and amino acids in healthy and infested pods (r= 0.96 & 0.91, respectively) showed a significant positive association with per cent pod damage caused by pod borers. Keywords Morphological and biochemical traits, Field bean, Pod borers, Karnataka Accepted: 30 May 2020 Available Online: 10 June 2020 Article Info