Author(s):

PP Holay, SK Patil, SR Kulkarni and PK Lokhande

Abstract: The investigations were carried out to determine the impact of physio-chemical characters of promising genotypes of pigeonpea seed against pulse beetle, Callosobruchus maculatus (Fabricius). Out of 25 genotypes, PKV-TARA was found most superior, which was recorded less ovipositional preference (10.25 eggs/10 seeds), adult emergence (71.01%), adult longevity (7.50 days) of C.maculatus and growth index (2.56). Among the physical parameters, hardness of seed played an important role on biological parameters of C.maculatus and grain damage. The PKV-TARA also recorded less grain damage (76.86%) and loss in grain weight (2.22%) with highest hardness of seed (21.94 kg/grain). The next promising genotypes viz., Vipula, BSMR-736 and PT-03-142 were found comparatively superior over rest of the genotypes. As regards the biochemical parameters, the genotypes having higher ash content with lower content of protein, carbohydrate and fat in seeds was found to be less preferred by the bruchid having less growth and development of C.maculatus with minimum grain infestation in the test genotypes.

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