Toll Free Helpline (India): 1800 1234 070

Rest of World: +91-9810852116

Free Publication Certificate

Vol. 11, Special Issue 2 (2022)

Evaluation of fungicide and bio-control agents against Sclerotinia stem rot of chickpea (Sclerotinia sclerotiorum)

Author(s):
Anamika Manhas, Richa Sharma and Stanzin Dorjey
Abstract:
Present studies on stem rot of chickpea caused by Sclerotinia sclerotiorum were carried out with an aim to determine the prevalence of Sclerotinia stem rot, development of symptoms, role of weather factors on disease development and morphological and cultural characters of the pathogen. Morphological and cultural studies revealed that fungus produced fluffy, white colour, gelatinous mycelium on potato dextrose agar media. Sclerotia were formed on potao dextrose agar. Epidemiological studies revealed that that the stem rot commenced from 2nd January (2nd standard week of 2013) reaching its highest peak 32.55 per cent in C-235 and 27.88 per cent in L-550. The disease development was maximum during 2nd to 6th standard week when maximum temperature ranged from 17.80 to 20.50 0C and relative humidity 91.30 to 96.10 per cent. Newer group of fungicide evaluated against sclerotinia stem rot causing pathogen, best results were obtained with tebuconazole which recorded 62.38 per cent inhibition followed by hexaconazole at 100 ppm. In case of traditional group of fungicides best results were obtained with carbendazim which recorded 73.83 per cent inhibition followed by SAAF (carbendazim 12% + mancozeb 63 WP) at recommended concentration. The antagonistic activity of two fungal and two bacterial biocontrol agents namely Trichoderma harzianum, Trichoderma viride, Pseudomonas fluorescence and Bacillus subtillis was studied by dual culture. Trichoderma harzianum yielded better results by inhibiting 63.41 per cent growth of Sclerotinia sclerotiorum. In case of bacterial biocontrol agents Bacillus subtillis yielded better results by inhibiting 57.77 per cent growth of the pathogen.
Compatibility of fungal bioagents were tested with newer and traditional group of fungicides and the best compatibility was found between tebuconazole and Trichoderma harzianum and Trichoderma harzianum and copper oxychloride at 50 ppm. In case of bacterial bioagent maximum compatibility was observed between hexaconazole and Pseudomonas fluorescence at 50 ppm under newer group and under traditional group Pseudomonas fluorescence showed maximum compatibility with thiophanate methyl followed by carbendazim.
Pages: 358-365  |  496 Views  234 Downloads
How to cite this article:
Anamika Manhas, Richa Sharma and Stanzin Dorjey. Evaluation of fungicide and bio-control agents against Sclerotinia stem rot of chickpea (Sclerotinia sclerotiorum). The Pharma Innovation Journal. 2022; 11(2S): 358-365.

Call for book chapter