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Subject: Plant Pathology × Author: Angadi, Honnappa D × End date: 1999 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    STUDIES ON ANTHRACNOSE OF CHILLI (Capsicum annuum L.) AND ITS MANAGEMENT
    (University of Agricultural Science, Dharwad, 1999) Angadi, Honnappa D; Naik, M K
    "The survey of the anthracnose disease undertaken in three districts representing rainfed and irrigated situations indicated that the disease was more prevalent in irrigated tracts in Raichur than rainfed tracts in Dharwad and Gadag districts. Raichur taluk is considered as hot spot for anthracnose during Kharif. The fungi Co/letotnchum capsici (Sydow) Butler and Bisby and Cagloeosporioides (Penz) Penz and Sacc were isolated from the affected chilli fruits collected from Regional Research Station farm, Raichur The pathogenicity was proved with the pure culture on detached red chilli fruits using pinprick method of inoculation Among the solid media potato dextrose agar was best followed by Czapeck's agar for the growth of the C. capsici. The maximum dry mycelial weight was observed after 16 days of incubatio,. Of the various liquid media, maximum dry mycelial weight was recorded in Richards medium. Temperature of 30 c and an acidic pH towards 6 were most favourable for growth of C.capsici. Among thirty seven genotypes screened under laboratory using pinprick method, genotypes Viz., PC-1, CO-1, lHR-3023 and LCA-301 showed resistance whereas genotypes CO-1, H-232, IHR-3023, KDSC-110-10, LCA-301 and PC-1 were resistant under field condition In the in vitro evaluation of fijngicides, mancozeb among non-systemic fijngicides and carbendazim and triademefon among systemic ones were very effective in inhibiting the growth of C. capsic.. whereas neem seed kernal extract and nimbicidine among plant extracts showed considerable amount of inhibition of fungal growth. In the in vivo evaluation of fungicides and botanicals, carbendazim recorded least disease incidence and highest yield Subsequently, net returns were more in carbendazim treated chilli plots at both concentrations (0.1% and 0 15%). The carbendazim gave the highest cost-benefit ratio of 1:10.04 and 1:7.96 respectively at 0.1 and 0.15 per cent concentrations and thus were found to be the best followed by mancozeb"