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Articles by S. Ashok
Total Records ( 2 ) for S. Ashok
  M. Rizwana Banu , A.R. Muthiah and S. Ashok
  In the present research, we studied the presence of phenolic acids in seeds of pigeon pea. Phenols extracted from seeds were analyzed by HPLC. Among the three phenols identified (Benzoic acid, Paranitro phenol and Orcinol) in different generations of pigeon pea. Concentrations of phenols were higher in tolerant cultivar (ICP 13201) than susceptible (CO5). While comparing three phenols amount of orcinol was higher than that of other two phenols. The difference was not very sharp for benzoic acid.
  M. Rizwana Banu , Ar. Muthiah and S. Ashok
  The legume pod borer, Helicoverpa armigera is one of the most divesting pests of pigeon pea. And it is an important biotic constraint to pigeon pea production worldwide. In recent years, development of Helicoverpa armigera populations resistant to insecticides has further hampered the control of measures. Therefore, identification and utilization of cultivars resistant to tolerant to Helicoverpa armigera would have a number of advantages, particularly for a relatively low value crop such as pigeon pea. Resistant/susceptible cultivars would provide an equitable, environmentally sound and sustainable pest management tool. High levels of resistance to pod borer have been reported in wild relatives and some of the cultivars of pigeon pea. The pod wall surface and their exudates play a major role in host selection process of inset herbivores. Based on this objective, in the present investigation, inheritance of resistance to pod borer in parents (Cajanus cajan) and their F1, F2, BC1 and BC2 generations have been studied. Single dominant gene was observed in F2 and backcross generations. This can be incorporated in the adapted cultivar by the simple backcross method of breeding.
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