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Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation

Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus (SpltNPV) from sunlight inactivation was tested in direct sunlight exposure bioassays and in the field on virus-treated Brassica chinensis var parachinensis plants. All adjuvants, except palm oil, gave significant p...

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Main Authors: Sajap, Ahmad Said, Abdul Bakir, Mohammad, Abdul Kadir, Hussan, Abdul Samad, Norani
Format: Article
Language:English
Published: 2009
Online Access:http://psasir.upm.edu.my/id/eprint/7034/
http://dx.doi.org/10.1016/j.aspen.2008.12.002
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spelling my.upm.eprints.70342010-07-29T07:58:47Z http://psasir.upm.edu.my/id/eprint/7034/ Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation Sajap, Ahmad Said Abdul Bakir, Mohammad Abdul Kadir, Hussan Abdul Samad, Norani Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus (SpltNPV) from sunlight inactivation was tested in direct sunlight exposure bioassays and in the field on virus-treated Brassica chinensis var parachinensis plants. All adjuvants, except palm oil, gave significant protection to the virus after 16 h of sunlight exposure, as shown by the larval mortalities. Cumulative mortalities after 14 days show that the virus + Tinopal treatment and the virus not to sunlight treatment attained 100% mortality, while the virus in riboflavin treatment and the crude brown sugar treatment caused mortality of less than 30%. However, the LT50 value of virus + Tinopal was 1.2 times lower than the unexposed virus. All virus-treated plants in the field trials had higher yields and lower damage indices than the control plants. Unlike the results from direct sunlight exposure bioassays, adjuvants, including virus + Tinopal LPW, did not significantly enhance efficacy of the virus against early instars of S. litura in the field. The unformulated virus was as effective as virus + Tinopal LPW and Nurelle-D in protecting the plants from infestation. Thus, in a well-planned pest management program, SpltNPV, without any adjuvant, can be used effectively for controlling S. litura on B. chinensis var parachinensis. 2009-06 Article PeerReviewed Sajap, Ahmad Said and Abdul Bakir, Mohammad and Abdul Kadir, Hussan and Abdul Samad, Norani (2009) Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation. Journal of Asia-Pacific Entomology, 12 (2). pp. 85-88. ISSN 1226-8615 http://dx.doi.org/10.1016/j.aspen.2008.12.002 10.1016/j.aspen.2008.12.002 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus (SpltNPV) from sunlight inactivation was tested in direct sunlight exposure bioassays and in the field on virus-treated Brassica chinensis var parachinensis plants. All adjuvants, except palm oil, gave significant protection to the virus after 16 h of sunlight exposure, as shown by the larval mortalities. Cumulative mortalities after 14 days show that the virus + Tinopal treatment and the virus not to sunlight treatment attained 100% mortality, while the virus in riboflavin treatment and the crude brown sugar treatment caused mortality of less than 30%. However, the LT50 value of virus + Tinopal was 1.2 times lower than the unexposed virus. All virus-treated plants in the field trials had higher yields and lower damage indices than the control plants. Unlike the results from direct sunlight exposure bioassays, adjuvants, including virus + Tinopal LPW, did not significantly enhance efficacy of the virus against early instars of S. litura in the field. The unformulated virus was as effective as virus + Tinopal LPW and Nurelle-D in protecting the plants from infestation. Thus, in a well-planned pest management program, SpltNPV, without any adjuvant, can be used effectively for controlling S. litura on B. chinensis var parachinensis.
format Article
author Sajap, Ahmad Said
Abdul Bakir, Mohammad
Abdul Kadir, Hussan
Abdul Samad, Norani
spellingShingle Sajap, Ahmad Said
Abdul Bakir, Mohammad
Abdul Kadir, Hussan
Abdul Samad, Norani
Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
author_facet Sajap, Ahmad Said
Abdul Bakir, Mohammad
Abdul Kadir, Hussan
Abdul Samad, Norani
author_sort Sajap, Ahmad Said
title Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
title_short Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
title_full Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
title_fullStr Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
title_full_unstemmed Efficacy of selected adjuvants for protecting Spodoptera litura nucleopolyhedrovirus from sunlight inactivation
title_sort efficacy of selected adjuvants for protecting spodoptera litura nucleopolyhedrovirus from sunlight inactivation
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/7034/
http://dx.doi.org/10.1016/j.aspen.2008.12.002
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score 13.211869

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