Field Crop 2018, Vol.1, No.3, 9-14
13
In the case of variety and
Trichoderma viride
interaction, AUDPC I value ranged from 1.632 to 15.976 with the
least in Sabitri (1.632), followed by untreated Sabitri (3.743) and treated Radha 7 (4.886), and the highest in
untreated Radha 7 (15.976). AUDPC II value ranged from 4.824 to 27.576 with the least in treated Sabitri (4.824),
followed by untreated Sabitri (10.146) which was at par with treated Radha 7 (13.07), and the highest in untreated
Radha 7 (27.576). Similarly, mean AUDPC value ranged from 3.228 to 21.774 with the least in treated Sabitri
(3.228), followed by untreated Sabitri (6.938) which was at par with treated Radha 7 (8.980), and the highest in
untreated Radha 7 (21.774) (Table 8).
Table 8 AUDPC value of leaf blast with interaction of variety and
Trichoderma viride
under field condition
S.N.
Treatment combination
AUDPC I
AUDPC II
Mean AUDPC
1
Radha 7 + 0 ml/lit of
T. viride
15.976
a
27.576
a
21.774
a
2
Radha 7 + 5 ml/lit of
T. viride
4.886
b
13.070
b
8.980
b
3
Sabitri + 0 ml/lit of
T. viride
3.743
bc
10.146
b
6.938
b
4
Sabitri + 5 ml/lit of
T. viride
1.632
c
4.824
c
3.228
c
Grand mean
6.557
13.904
10.23
CV (%)
29.103
20.547
19.157
MS Error
3.6416
8.1613
3.8406
LSD (0.05)
2.5586
3.8302
2.6275
P value
0.0003***
0.00085***
5.60E-05***
Note: DAT: Days after transplanting, CV: Coefficient of variation, LSD: Least significant difference, Means followed by the same
letter in a column are not significantly different by DMRT at 0.1% level of significance
3 Discussion
Disease incidence was observed at 75, 80 and 85 DAT after the first appearance of disease symptoms. The disease
incidence was almost three times more in Radha 7 than Sabitri. It was 11% and 32% for Sabitri and Radha 7
respectively. Experiment by Chaudary et al. (2001) and Khanal et al. (2016) also presented the lowest incidence of
blast disease in Sabitri.
Trichoderma treated was less affected with disease. This is in line with the result reported by the Kumar et al.
(2017). Sharma (2006) also recorded minimum leaf blast severity with
T. viride.
Trichoderma were found effective
in rice for controllong blast. Singh et al. (2012) also showed 23.30 to 30.55% disease incidence in Trichoderma
treatment and 40.50 to 48.09% in non- treatment. This is in line with the findings of Khanal et al. (2016).
Sabitri showed lowest level of AUDPC value which is supported by Chaudhary et al. (2001) suggesting that
Sabitri variety to be resistant to blast pathogen. This result also coincides with the findings of Chaudhary et al.
(2005). The decreased AUDPC for sheath blight infected rice plants was also observed in the research findings of
Franca et al. (2015) when sprayed with Trichoderma.
4 Conclusion
Trichoderma viride
application was found efficient for leaf blast management and it is more effective when
applied along with improved variety. The performance of Sabitri was found effective over Radha 7 for leaf blast
disease management in Pyuthan district of Nepal.
Authors’ contributions
Each author has equal contribution to write this manuscript and conduct the experiment. All authors read and approved the final
manuscript.
Acknowledgments
We would like to express our heartfelt thanks to Agriculture and Forestry University, Rampur, Chitwan and Nepal Agriculture
Research Council, Khajura, Banke for providing financial and technical support to conduct this research.
