STUDIES ON POMEGRANATE WILT CAUSED BY Ceratocystis fimbriata Ell. & Halst.
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Date
2021-12-27
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Abstract
Pomegranate is an important commercially grown fruit crop of India. The crop suffers from many diseases, among them wilt caused by Ceratocystis fimbriata Ell. & Halst. is a major threat to pomegranate production. The present investigation was undertaken to know the occurrence of the disease in southern Karnataka, in vitro evaluation of fungicide, bio-agents and botanicals. The maximum wilt incidence was observed in
Yelladakere (62.06%) followed by Maralavadi (52.00%) and Veerapura (40.00%). The
pathogen was identified based on molecular studies as C. fimbriata (OK597212). The
pathogen grew well on potato dextrose agar, potato carrot agar and corn meal agar media.
The favourable temperature of 30°C and pH 7.0 were found ideal for the growth of the
pathogen. Among different fungicides, propiconazole (81.25%), propineb (92.98%) and
carbendazim + mancozeb (saaf) (100%) were found most effective under in vitro condition. The highest inhibition of the pathogen was found in pongamia leaf extract (59.83%). Among the fungal and bacterial bio-agents Trichoderma viride-Tv 3 (80.55%) and Bacillus subtilis Dharwad isolate (63.33%) were showed maximum mycelial inhibition of C. fimbriata under in vitro conditions.
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