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Molecular Entomology 2013, Vol.4, No.4, 22-25
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22
Research Article Open Access
Factors Influencing the Incidence of Mango Leaf Webber,
Orthaga euadrusalis
Hampson, (Pyralidae:Lepidoptera) in Mango and Their Management
Swati Singh , Rajesh Verma
R.V.S.K.V.V. Fruit Research Station, Berasia road, Entkhedi, Bhopal, M.P. India
Corresponding author email: swati13singh@yahoo.co.in;
Author
Molecular Entomology 2013, Vol.4, No.4 doi: 10.5376/me.2013.04.0004
Received: 15 Apr., 2013
Accepted: 25 Apr., 2013
Published: 04 Jul., 2013
Copyright
©2013 Singh and Verma. This is an open access article published under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:
Singh and Verma, 2013, Factors Influencing the Incidence of Mango Leaf Webber,
Orthaga euadrusalis
Hampson, (Pyralidae:Lepidoptera) in Mango and Their
Management, Molecular Entomology, Vol
.
4,
No. 4
22-25 (doi: 10.5376/me.2013.04.0004)
Abstract
Screening, seasonal activity and management studies of mango leaf webber, Orthaga euadrusalis Hampson, (Pyralidae :
lepidoptera) carried out at Fruit Research Station (FRS), Entkhedi, The least susceptible varieties were Chinnarasm, Piddarasm,
Bombaygreen, Malda, Sindhuri and Alphanjo. While the most susceptible varieties were Mango Glass, Dahiyar, Temuria and
Langrah. Significantly higher infestation was recorded in varieties had higher and dense tree canopy (r value = 0.838). Pest remained
active in mango orchard from June to December and completed different over lapping generations during this period. Mechanical
removal in early part of the season spot treatment with Imidacloprid (0.02%) and application of insect growth regulator
Diflubenzuron were found effective and most feasible for the management of mango leaf webber.
Keywords
Mango; Webber; Canopy; Management; Screening
Introduction
India is the largest producer of mango in the world,
contributing 53.63% of total mango production. In
spite of its larger coverage the productivity of mango
is quite less as compared to other mango producing
countries. The probable causes of low productivity are
the wide range of the climatic condition, diversity of
associated pests and diseases and the management.
Among the insect pests, mango leaf webber, Orthaga
euadrusalis Hampson, (Pyralidae: Lepidoptera) is one
of the major pests responsible for low productivity,
heavily infested trees gives a burnt look and severe
infestation result in complete failure of flowering
(Vergese,1998). It is widely distributed in different
agro-climatic zones of India, and gained the status
of serious pest in UP, Uttaranchal, and AP. (Singh et.
al. 2006). Mango leaf webber infests over wide
range of mango varieties and cause damage before
mango season.
Some of the mango cultivars have been reported to be
resistant to the pest attack (Raddy et al., 2001).
Management of mango leaf webber is difficult firstly
due to the large size of mango tree secondly
micro-ecosystem of the mango orchard in which the
pest breeds in active period and remained in the same
orchard during off-season (Shukla et al., 2001).
General application of insecticide in orchard is
hazardous to non-target organisms; therefore it is
necessary to have an idea about the host liking and
effective eco-friendly methods for its management.
1 Result
1.1 Seasonal activity of the mango leaf webber
The activity of pests in mango orchards was initiated
in the month of June and remain active up to the
December beyond that sudden decline was observed
no further infestation was noticed in the mango
orchards .The pest complete several over lapping
generation from June to December .The most active
period was September to December with mean
infestation ranged from 20.00 to 25.00 webbed
mass/tree. Weather factors viz. temperature (Maximum
and Minimum), rainfall and related humidity had no
direct influence on the activity of the pests the
correlation was non significant.
1.2 Screening of the mango varieties against the
infestation of mango leaf webber
Results indicated that the six varieties of mango
namely Chinnarasm (0.22 WM/Tree), Bombay Green
(0.41 WM/tree), Malda (0.43 WM/Tree), Piddarasm
(0.50 WM/Tree), Sindhuri (0.54 WM/Tree) and
Alphanjo (0.59 WM/Tree) were the least susceptible