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by
R. B. Singh |
Total Records (
1 ) for
R. B. Singh |
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Bharat Chandra Nath
,
J. P. Singh
,
Seweta Srivastava
and
R. B. Singh
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In vitro experiments were carried out with Phaeoisariopsis
personata isolate to determine its sensitivity/tolerance to different fungicides
viz., Tebuconazole (0.05%), Tebuconazole (0.10%), Tebuconazole (0.15%), Tebuconazole
(0.20%), Tebuconazole (0.40%), Folicur (0.10%) and Mancozeb (0.30%) using poisoned
food technique both in solid and liquid medium. In the solid medium method,
visual observation was taken 20 days after inoculation of the pathogen. There
was no significant difference among the different fungicides in their efficacy
against P. personata, compared to control. In case of liquid medium the
observations were taken after 25 days of inoculation and the results are presented.
There was significant difference between the fungicides in per cent inhibition
against the mycelial growth of the pathogen, P. personata. Among all
the fungicides, Tebuconazole 0.4% (87.97%t) showed maximum inhibition followed
by Tebuconazole 0.2% (85.24%) and Tebuconazole 0.15% (83.50%), among these Tebuconazole
0.15% was found to be optimum. Application of fungicidal sprays influenced the
development of Cercospora leaf spot and reduced its intensity. Among
these applications of different fungicides, Tebuconazole (0.15%) gave best result
and reduced the disease intensity to 52.42%. Area under disease progress curve
(AUDPC) greatly varied among different fungicidal treatments and showed significant
difference in yield data. Impact of fungicides used for disease control was
apparent on yield per plot. Tebuconazole (0.15%) gave best result and increased
yield up to 67% as compared to 39% increase by Tebuconazole (0.10 %). |
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