International Journal of Horticulture, 2017, Vol.7, No.28, 250-261
252
3 Results
3.1 Number of gherkin fruit borer (
Diaphania indica
) larvae per meter row length
3.1.1 First season
At one day before spray the number of fruit borer larvae varied from 11.5 to 13.4 per meter row length among the
various insecticides tested without any significant differences (Table 1).
Table 1 Efficacy of Flubendiamide 480 SC (Fame 480 SC) against fruit borer,
Diaphania indica
larvae in Gherkin (1
st
season)
Tr.
No.
Treatment
Dosage
Pre-treatment
count (1 DBS)
Post-treatment counts (Number of larvae/meter row
length)
(g a.i./ha) Forml./ha (ml)
After I Spray
After II Spray After III Spray
5 DAS 10 DAS 5 DAS 10 DAS 5 DAS 10 DAS
T
1
Flubendiamide 480
SC (Fame 480 SC)
24
50
12.9
8.5
11.4
8.2
9.7
5.4
3.4
T
2
Flubendiamide 480
SC (Fame 480 SC)
36
75
12.3
6.2
9.3
6.0
7.6
4.3
2.1
T
3
Flubendiamide 480
SC (Fame 480 SC)
48
100
13.0
5.9
8.2
5.6
6.7
3.5
1.2
T
4
Flubendiamide 480
SC (Fame 480 SC)
60
125
11.5
3.3
6.3
3.2
4.5
1.2
0.4
T
5
Indoxacarb 14.5 SL
21.75
150
12.7
3.4
6.5
3.4
4.7
1.3
0.5
T
6
Lambda Cyhalothrin
5 EC
18.75
375
13.2
7.3
10.5
7.4
8.5
3.7
3.5
T
7
Untreated check
-
-
13.4
14.2
15.3
16.0 16.8
16.5
16.1
S.Em.±
-
-
0.7
0.8
0.5
0.7
0.6
0.7
0.2
C.D. (0.05)
-
-
N.S.
2.4
1.6
2.1
1.8
2.1
0.6
C.V. (%)
-
-
14.2
16.4
18.5
12.8 15.2
17.3
17.8
Note: DBS = Day before spray; DAS = Days after spray
At 5 days after first spray lowest number of larvae was observed in flubendiamide 480 SC @ 60 g a.i./ha (3.3/
meter row length) which was on par with indoxacarb 14.5 SL @ 21.75 g a.i./ha (3.4 larvae/ meter row length) and
these two treatments were significantly superior to rest of the insecticidal treatments. The next best treatments
included flubendiamide 480 SC @ 48 g a.i./ha, flubendiamide 480 SC @ 36 g a.i./ha and lambda cyhalothrin 5 EC
@ 18.75 g a.i./ha which recorded 5.9, 6.2 and 7.3 larvae per meter row length, respectively and were on par with
each other. The least effective treatment was flubendiamide 480 SC @ 24 g a.i./ha which recorded highest number
of larvae (8.5/ meter row length) and was significantly superior over untreated check (14.2/ meter row length).
At 10 days after first spray, there was a slight increase the larval population. However, the trend remained same as
above. The lowest number of larvae was recorded in flubendiamide 480 SC @ 60 g a.i./ha (6.3/ meter row length)
which was on par with indoxacarb 14.5 SL @ 21.75 g a.i./ha (6.5 larvae/ meter row length) and these two
treatments were significantly superior over rest of the insecticidal treatments. The next best treatments included
flubendiamide 480 SC @ 48 g a.i./ha and flubendiamide 480 SC @ 36 g a.i./ha (8.2 and 9.3 larvae/ meter row
length, respectively) and were on par with each other. The least effective treatments were flubendiamide 480 SC
@ 24 g a.i./ha and lambda cyhalothrin 5 EC @ 18.75 g a.i./ha which recorded highest number of larvae (11.4 and
10.5/ meter row length, respectively) and were significantly superior over untreated check (15.3 larvae/ meter row
length).
At 5 and 10 days after second spray also flubendiamide 480 SC @ 60 g a.i./ha (3.2 and 4.5 larvae/ meter row
length, respectively) and indoxacarb 14.5 SL @ 21.75 g a.i./ha (3.4 and 4.7 larvae/meter row length, respectively)
