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ThesisItem Open Access Ecofriendly Management of Fungal Foliar Diseases of Groundnut (Arachis hypogaea L.)(University of Agricultural Sciences, Dharwad, 2018-06) Aditya, Sanghmitra; Hegde, Gurudatt M.Groundnut is an important oilseed and food crop of India. An experiment was conducted in the Bioresource farm, IOF, UAS, Dharwad during kharif 2017 to know the relationship of weather factors with fungal foliar disease development and to manage them organically. The results from survey indicated that, the severity of early leaf spot (ELS), late leaf spot (LLS) and rust ranged from 20.00 to 42.22 PDI, 17.78 to 66.66 PDI and 17.78 to 60.88 PDI respectively. Maximum severity of fungal foliar diseases was recorded in Dharwad and minimum in Bagalkote district. Epidemiology studies revealed that early sowing on 22nd June 2018 escaped the rust infection while late sowing on 25th July 2018 escaped leaf spot infection. Spore load was highest during 38th standard meteorological week (SMW) for ELS and 40th SMW for LLS and rust. The correlation studies of PDI with weather parameters indicated a significant positive correlation with cumulative rainfall (CRF) and cumulative number of rainy days (CRD), irrespective of the dates of sowing. Regression studies indicated that fungal foliar disease development was significantly positively affected by CRD. In vitro spore germination studies revealed that all the botanicals evaluated (Adhatoda vasica, Azadirachta indica, Pongamia pinnata) were more effective at five per cent concentration against fungal foliar diseases. In vivo studies revealed that, minimum disease severity was recorded in consortia of bioagents (Trichoderma harzianum – Pseudomonas fluorescens – Bacillus subtilis) treated plots which was on par with wettable sulphur. All the plant growth and yield parameters were positively influenced in all the treatments when compared to the untreated control. The highest yield (41.51 q/ha), highest net returns (Rs. 1,21,712) and B:C ratio (3.75) was recorded in the consortia of bioagents treated plots.