Field Crop 2018, Vol.1, No.3, 9-14
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highest disease incidence was observed and it was significantly lowest in Sabitri in comparison to Radha 7. The
disease incidence was almost three times more in Radha 7 than Sabitri. It was 11% and 32% for Sabitri and Radha
7 respectively (Table 2).
Table 2 Incidence of leaf blast in rice at 80 DAT under field condition at Pyuthan
S.N.
Factor A
Maximum disease incidence
1
Radha 7
32
a
2
Sabitri
11
b
Grand mean
21.5
CV (%)
46.843
MS Error
101.43
LSD (0.05)
9.66
P value
0.000046***
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
Application of
T. viride
was found significant in reducing the incidence of leaf blast disease. Disease incidence was
almost two times less in
T. viride
treatment. It was 16% and 27% for treatment and non-treatment respectively
(Table 3).
Table 3 Incidence of leaf blast treated with
Trichoderma viride
under field condition after 80 days to transplanting at Pyuthan
S.N.
Factor B
Maximum disease incidence
1
0 ml/lit of
T. viride
27
a
2
5ml/lit of
T. viride
16
b
Grand mean
21.5
CV (%)
68.131
MS Error
215.71
LSD (0.05)
14.088
P value
0.007**
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 1% level of significance
2.2 Leaf blast severity
Leaf blast severity was also found maximum at 80 DAT. The maximum severity of leaf blast disease was found
significant (P<0.001) among both factors i.e. variety and
Trichoderma viride
. Disease Severity was found least in
Sabitri and
Trichoderma viride
treatment (Table 4). It was significantly lowest in sabitri as compared to Radha 7.
It was 1.472% and 3.864% for Sabitri and Radha 7 respectively.
Table 4 Severity of leaf blast disease in rice variety under field condition on 80 days to transplanting
S.N.
Factor A
Maximum disease severity
1
Radha 7
3.864
a
2
Sabitri
1.472
b
Grand mean
2.668
CV (%)
43.221
MS Error
1.3297
LSD (0.05)
1.1061
P value
0.0000029***
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
T. viride
treatment significantly reduced the percentage of leaf blast severity. In this study,
T. viride
was applied at
