Central Rice Research Institute Annual report...2011-12

Table 42. Effect of bio-control agents on sheath blight
disease during dry and wet seasons, 2011
Disease
incidence Yield
Variety & Treatment (%) (t ha -1 )
Dry Season 2011
Jaya & T. viride 29.81 (33.09) 3.96
Jaya & P. fluorescens 37.65 (37.85) 3.82
Jaya & Sheathmar-3 44.90 (42.07) 3.91
Jaya (Control) 72.42 (58.32) 3.28
Joyamati & T. viride 31.63 (34.22) 3.88
Joyamati & P. fluorescens 27.30 (31.50) 4.05
Joyamati & Sheathmar-3 44.88 (42.06) 3.56
Joyamati (Control) 74.51 (59.68) 3.02
Chandrama & T. viride 30.76 (33.68) 4.23
Chandrama & P. fluorescens 38.50 (38.35) 4.18
Chandrama & Sheathmar-3 42.92 (40.93) 3.97
Chandrama (Control) 71.28 (57.59) 3.66
CD 5% (Variety) (11.87) 0.81
CD 5% (Treatment) (10.97) 0.57
Wet season 2011
Tapaswini & T. viride 36.47 (33.09) 4.54
Tapaswini & P. fluorescens 39.65 (37.85) 4.28
Tapaswini & Sheathmar-3 45.71 (42.07) 4.06
Tapaswini Control) 80.72 (58.32) 3.52
Mahsuri & T. viride 32.54 (34.22) 3.91
Mahsuri & P. fluorescens 28.80 (31.50) 4.26
Mahsuri & Sheathmar-3 46.63 (42.06) 4.20
Mahsuri (Control) 78.44 (59.68) 3.58
Pratikshya & T. viride 34.42 (33.68) 4.35
Pratikshya & P. fluorescens 37.26 (38.35) 4.28
Pratikshya & Sheathmar-3 42.51 (40.93) 4.11
Pratikshya (Control) 72.60 (57.59) 3.61
CD 5% (Variety) (12.29) 0.77
CD 5% (Treatment) (12.49) 0.69
spot under field conditions to an extent of 20% over
control. The plant extracts were non-significant with
each other but significant with the control. Minimum
disease intensity ranged from 15.09-26.89% within the
plant extracts compared to disease intensity of 32.22%
in the control plot.
Evaluation of bio-control agents for
management of sheath blight
The efficacy of bio-control agents, Trichoderma viride
and Pseudomonas fluorescens along with standard fungicide
Sheathmar-3 (Validamycin 3%) was tested in a
field trial for the management of sheath blight during
dry season, 2011 on the varieties Jaya, Joymati and
Chandrama, and during wet season, 2011 on varieties
Tapaswini, Mahsuri and Pratikshya. Treatment of T.
viride on varieties Jaya, Chandrama and P. fluorescens
on Joymati during dry season, significantly reduced
the sheath blight disease incidence and increased the
grain yield. But during wet season, treatment of T. viride
on Tapaswini and Pratikshya significantly reduced the
sheath blight incidence and increased the grain yield
(Table 42).
Development, Evaluation and Validation
of IPM Modules for Different Rice Ecosystems
Insect pest management under rainfed upland
situation at Cuttack
A field trial was conducted for insect pest management
in upland rice during wet season 2011 at village
Banipada, Tangi-Chaudwar block, Cuttack. Two varieties,
one local variety and a high yielding variety Anjali
were grown in the trial. IPM practices involved seed
treatment with Chlorpyrifos 20EC @ 3.75 lit 100kg -1
seed, herbicidal application of Pretilachlor @ 0.75 kg
a.i. ha -1 at 3 days after sowing and application of
Monocrotophos 36EC @ 0.5 kg a.i. ha -1 at ETL, fixing of
Table 43. Testing of IPM module in rainfed upland during Wet season, 2011
% Dead % White % Gundhi bug % Termite Yield
Treatment heart ear head damage damage t ha -1
Anjali with IPM 4.05 (11.60) 4.5 (12.24) 8.75 (17.19) 5.3 (13.028) 2.85
Anjali without IPM 7.5 (15.88) 7.67 (16.07) 14.75 (22.58) 9.75 (18.18) 1.90
Brown Gora with IPM 4.42 (12.13) 4.75 (12.57) 7.87 (16.29) 5.25 (13.52) 2.10
Brown Gora without IPM 8.0 (16.42) 7.87 (16.29) 16.00 (23.57) 10.25 (18.66) 1.15
CD (P=0.05) 0.95 0.90 0.78 1.37 0.42
Value in parentheses indicate angular transformed values
90 CRRI ANNUAL REPORT 2011-12