EVALUATION OF INDIAN BEAN GENOTYPES AGAINST POD BORER WELICOVERPA ARMIGERA (HUBNER)] ON THE BASIS OF PLANT MORPHOLOGICAL CHARACTERS
Â Department of Entomology, N.M. College of Agriculture, Naysari Agricultural University, Naysari, Gujarat, India. 1 College of Agriculture, Naysari Agricultural University, Waghai complex, Dangs- 394 730 (Gujarat)
GANGURDE, MA', AND SURD L KUMAR
Screening of Indian bean (Dolichos lablab L., Syn. Lablab purpureus L.) genotypes was carried out against pod borer Helicoverpa armigera (Hubner) on the basis of to plant morphological characters at Naysari Agricultural University, Naysari during 2012-2013. Of the one hundred and fourteen Indian bean entries screened, no entry was found free from pod borer damage; however, lowest pod damage (0.96 %) was observed in NIB 46 indicating tolerant or resistant reaction, while it remained highest in Gujarat papdi 1 (40.46 %) indicating highly susceptible reaction. Genotypes possessing spreading type growth habit were more susceptible to H. armigera than erect type entries. Straight podded entries indicated resistance or tolerance than those possessing curved pods. Genotypes which had higher leaf width, leaf area, pod width, pod area and number of seeds per pod displayed significant negative relationship with pod damage indicating resistance against pod borer oriented pod damage. Likewise, genotypes with purple coloured leaf vein, stem, flower and pod showed resistance or tolerance than those possessing light green colour.