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BIOEFFICACY OF ENTOMOPATHOGENIC NEMATODE (EPN), Heterorhabditis indica (Poinar) AGAINST TOBACCO CATERPILLAR, Spodoptera litura (Fabricius) IN CABBAGE

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Title BIOEFFICACY OF ENTOMOPATHOGENIC NEMATODE (EPN), Heterorhabditis indica (Poinar) AGAINST TOBACCO CATERPILLAR, Spodoptera litura (Fabricius) IN CABBAGE
 
Creator ANTHONY MANGKHOTHONG HAOKIP
 
Contributor RAHMAN, S.M.A.S
 
Subject BIOEFFICACY, ENTOMOPATHOGENIC, NEMATODE, Heterorhabditis, indica, AGAINST, TOBACCO, CATERPILLAR, Spodoptera litura, CABBAGE
 
Description Investigations on Entomopathogenic Nematode (EPN), Heterorhabditis indica
(Poinar) were carried out in the Students’ Farm, College of Agriculture,
Rajendranagar, Hyderabad to evaluate the bioefficacy of H.indica against Spodoptera
litura (Fabricius) in comparision with other available biological options and
insecticidal check. Similarly, with a view to enhance the field bioefficacy of H.indica
against S. litura, certain UV protectants viz., robin blue, ujala, sodium sulphate,
ranipal and teepol were evaluated in Farmer’s field for their ability to protect the
nematode from UV radiations. A laboratory study was also taken up as a part of this
investigation to visualize the impact of certain antidesicants viz.,Castor oil, Glycerine,
Triton X 100, Tween 20 and Liquid paraffin in terms of their ability to maintain the
virulency of the formulated EPN and thereby increasing the shelf life of the product.
The findings of the investigation have shown that among the biological options
tested, H.indica @1.5 billion IJs ha-1 was found to be promising by achieving 69.29
per cent reduction in the larval population over control. Perusal of the data with regard
to the evaluation of UV protectants gave a clear indication that Ranipal@ 5g L -1 is
the most suited adjuvant to be mixed with the EPN to protect it from harmful UV
radiation under field conditions with maximum 72.84 per cent larval reduction over
control. Similarly, in the study relating to the evaluation of certain antidesicants for
their ability to increase the shelf life and thereby maintain the pathogenicity, the
findings gave a direction that both Glycerine (1%) and Liquid paraffin (1%) were
found to be the best antidesicants resulting in the least survival of the treated larvae
which was 13.33 per cent at both 15 and 30 Days After Storage (DAS)for both the
chemicals and 6.67 and 13.33 per cent respectively at 45 DAS.
Overall results of the present experimentation proved that H.indica @ 1.5
billion IJs ha-1 was found to be promising and potentially can act as a replacement for
chemical pesticides, for the management of S. litura in cabbage. While, Ranipal@ 5g
L-1 was found to be the best adjuvant to be mixed with the EPN formulation for
protection from UV radiation in field conditions and Glycerine (1%) and liquid
paraffin (1%) were adjudged to be the most suitable antidesicant to be mixed with the
formulation for sustaining the virulency and increasing the shelf life of the product.
 
Date 2016-08-08T14:36:55Z
2016-08-08T14:36:55Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71561
 
Language en
 
Relation D8184;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD