Vol. 10, Issue 5 (2021)

Author(s):
P Ramanjineyulu, K Viswanath, P Nagamani and N Kiran Kumar

Abstract:
Pod rot is a serious disease of groundnut crop affecting the quality and yield potentiality to a large extent, it poses a great threat to the groundnut farming community. In the evaluation of the efficacy of four isolates of Trichoderma spp, and four isolates of rhizospheric bacteria against all the isolates of Fusarium spp, Rhizoctonia bataticola, Sclerotium rolfsii, TT4 isolate of Trichoderma has shown 41.3 per cent and TB3 isolate of rhizospheric bacteria has shown 66.0 per cent highest mean inhibition. Among the fungicides tested against pathogen isolates which exhibited the lowest mean per cent inhibition in dual culture studies viz., Fusarium sp (TF1), Rhizoctonia bataticola (TRb8), Sclerotium rolfsii (TSr6), tebuconazole and tebuconazole + trifloxystrobin has shown cent per cent inhibition at all the three concentrations. In in vivo evaluation of integrated management components against the three isolates of pathogens, the treatment T6 i.e. seed treatment with tebuconazole @ 1g/kg of seed, soil application of potential fungal and bacterial bio agents accompanied by soil application of gypsum at 45 DAS has recorded the lowest pod rot incidence of 11.4, 20.7 and 6.0 per cent respectively. Management of the disease itself is difficult due to the complex of pathogen association, for which there is a need for the integration of cultural, biological and chemical methods in disease management.