International Journal of Horticulture, 2017, Vol.7, No.28, 250-261
258
All the insecticides recorded significantly higher marketable fruit yield than untreated check. Three sprays of
flubendiamide 480 SC @ 60 g a.i./ha produced significantly higher marketable fruit yield of 9.65 t/ha followed by
indoxacarb 14.5 SL @ 21.75 g a.i./ha (9.52 t/ha) and were significantly superior over rest of the insecticidal
treatments (Table 4).
Effect of insecticides on natural enemies
The data on effect of insecticides on natural enemies are presented in Table 5 and Table 6. The coccinellid beetles
varied from 1.70 to 1.90 and 1.62 to 1.94 per plant at one day before imposition of treatments during first and
second season, respectively. Even though there was slight decrease in population of coccinellid beetles after sprays,
the population did not vary among various insecticidal treatments at five and ten days after first, second and third
sprays during both the seasons.
Phytotoxicity
The data pertaining to phytotoxicity are presented in Table 7. None of the insecticidal treatments showed any type
of phytotoxic symptoms on gherkin plants at one, three, seven ten and fifteen days after spraying of flubendiamide
480 SC @ 60 g a.i./ha, flubendiamide 480 SC @ 120 g a.i./ha and flubendiamide 480 SC @ 180 g a.i./ha.
4 Discussion
These findings are in line with Abdul Latif et al. (2009) who reported that flubendiamide application showed
better performance in reducing 80.63 per cent fruit infestation by
Leucinodes orbonalis
Guenee and produced the
higher fruit yield in brinjal.
Tatagar et al. (2009) reported that among various dosages flubendiamide 20 WG @ 60 g a.i. ha
-1
recorded highest
yield of 7.48 q ha
-1
with lowest fruit damage (by
H. armigera
and
S. litura
) of 3.45 per cent followed by
flubendiamide 20 WG @ 40 g a.i. ha
-1
(6.72 q ha
-1
) in chilli.
Mohapatra et al.
(2010) found that flubendiamide belongs to a novel class of insecticide which controls
lepidopteran pest complex of cabbage such as diamondback moth, cabbage white butterfly, cluster caterpillar etc.
Table 5 Effect of Flubendiamide 480 SC (Fame 480 SC) on adult coccinellid beetle population in Gherkin (1
st
season)
Tr.
No.
Treatment
Dosage
Pre-treatment
count (1 DBS)
Post-treatment counts (Number of adults per plant)
(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
1.90
1.72
1.65
1.40 1.35
1.27
1.25
T
2
Flubendiamide 480
SC (Fame 480 SC)
36
75
1.70
1.65
1.52
1.42 1.32
1.23
1.20
T
3
Flubendiamide 480
SC (Fame 480 SC)
48
100
1.83
1.61
1.47
1.35 1.21
1.17
1.15
T
4
Flubendiamide 480
SC (Fame 480 SC)
60
125
1.86
1.52
1.35
1.24 1.20
1.12
1.10
T
5
Indoxacarb 14.5 SL 21.75
150
1.85
1.45
1.28
1.22 1.18
1.15
1.00
T
6
Lambda Cyhalothrin
5 EC
18.75
375
1.80
1.60
1.30
1.21 1.20
1.18
1.12
T
7
Untreated check
-
-
1.87
1.80
1.75
1.71 1.65
1.63
1.60
S.Em.±
-
-
0.12
0.18
0.21
0.20 0.18
0.19
0.24
C.D. (0.05)
-
-
N.S.
N.S.
N.S.
N.S. N.S.
N.S.
N.S.
C.V. (%)
-
-
16.8
14.8
13.7
15.7 13.5
13.7
12.4
Note: DBS = Day before spray, DAS = Days after spray
