Basic HTML Version
Molecular Entomology 2013, Vol.4, No.4, 22-25
http://me.sophiapublisher.com
23
varieties with minimum the infestation range 0.0 to
1.25, WM/Tree respectively. These varieties were
statistically at par with Totapari (2.63 WM/Tree),
Safeda (3.63 WM/Tree), HathiJhool (2.51 WM/Tree),
Karela (3.71 WM/Tree), Local collection (2.68
WM/Tree), Bangalora (2.09 WM/Tree), Bombay
Yellow (3.18 WM/Tree), Mallika (4.2 WM/Tree) and
lalpari (2.95 WM/Tree). Varieties like Gulab khas,
Swarn Rekha, Malgoha, Dasheri, Hapus and Fajali
were received moderate infestation, but the level of
infestation were found consistent throughout the
observation period. Most susceptible varieties were
Langrah (15.57 WM/Tree), Temuria (15.23 WM/Tree),
Dahiyar (10.83 WM/Tree) and Mango Glass (9.87
WM/Tree). Singh et al. 2006 reported dasheri cultivar
was the most susceptible and Mallika received low
incidence and Amrapalli cultivar was completely free
from infestation (Table 1).
1.3 Influence of tree canopy on the infestation of
mango leaf webber
Significant and positive correlation (r value = 0.838)
was observed between the tree canopy type and the
extent of infestation level. It was observed that the
mango varieties were not entirely responsible for the
different infestation level of the pest but tree canopy
also play an important role in determining the pest
infestation. The least susceptible varieties of mango
was having canopy of type 1 and type 3-recorded 1.99
(Safeda, Malda, Bombay yellow, Sinduri, Bombay
green, Alphanjo, Lalpari and Sapia) and 1.13
(Chinnarasam, Piddarasam and Mallika) mean
infestation of mango webber per tree respectively. The
most susceptible cultivar was Dahiyar, Fajli and
Temuria possessing canopy type-7 (10.86 mean
infestation) (Table 2).
Table 1 Screening of mango varieties against of mango leaf webber
S.No.
Mango variety
Mean infestation
(Mean of six months)
S.No.
Mango variety
Mean infestation
(Mean of six months)
1
Mango glass
9.87 (0.312)
16
Local selection
2.68 (1.73)
2
Totapari
2.63 (1.72)
17
Banglora
2.09 (1.54)
3
Alampur
5.26 (2.41)
18
Malda
0.43 (1.04)
4
Desheri
5.30 (2.30)
19
Rajapuri
4.42 (2.08)
5
Safeda
3.68 (1.91)
20
Langrah
15.57 (4.00)
6
Hathijhool
2.51 (1.69)
21
Fajli
6.58 (2.63)
7
Gulabkhas
4.85 (2.25)
22
Bombay green
0.41 (0.94)
8
Swarnarekha
5.91 (2.45)
23
Sindhuri
0.54 (1.00)
9
Malgoha
5.19 (2.36)
24
Bombay yellow
3.18 (1.84)
10
Chinnarasm
0.22 (0.83)
25
Temuria
15.23 (3.83)
11
Piddarasm
0.50 (0.97)
26
Amrapali
9.13 (2.62)
12
Kawaji patel
7.00 (2.61)
27
Malika
4.20 (1.67)
13
Dahiyar
10.83 (3.25)
28
Alphanjo
0.59 (1.01)
14
Hapus
5.72 (2.44)
29
Sapia
4.21 (2.07)
15
Karela
3.71 (2.00)
30
Lalpari
2.95 (1.80)
SEm ± 0.470, CD 1.404
Table 2 Treatment details
S.No.
Chemical name
Trade name
Dose mL/ liter
1
Dimethoate
Rogar 30 EC
2.0 (0.06%)
2
Diflubenzuron
Dimilin 25 WP
0.5 (0.01%)
3
Triazophos
Hostathion 40 EC
1.5 (0.06%)
4
Chlorpyriphos
Dhanwan 20 EC
2.0 (0.04%)
5
Indoxacarb
Dhawa 14.5 EC
1.0 (0.014%)
6
Imidacloprid (Gen. Spray)
Confidor 17.8 SL
1.2 (0.02%)
7
Imidaclorpid (Spot Treat)
Confidor 17.8 SL
1.2 (0.02%)
8
Mechanical removel
-
-
9
Neem Oil
Nimbobas
5.0 (0.5%)
10
Control
Water Spray
-