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The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide

Malaysian Technical Universities Conference on Engineering and Technology (MUCET) 2012 organised by technical universities under the Malaysian Technical Universities Network (MTUN), 20th - 21st November 2012 at Hotel Seri Malaysia, Kangar, Perlis, Malaysia.

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Bibliographic Details
Main Authors: Sharifah Fathiyah, Syed Mohamad, Shahril, Mohamad, Azila, Abdul Aziz, Dr.
Other Authors: azila@cheme.utm.my
Format: Working Paper
Language:English
Published: Malaysian Technical Universities Network (MTUN) 2013
Subjects:
Aphis gossypii
Surface tension
Lauric acid
Toxicity
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/27368
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spelling my.unimap-273682013-08-05T01:19:08Z The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide Sharifah Fathiyah, Syed Mohamad Shahril, Mohamad Azila, Abdul Aziz, Dr. azila@cheme.utm.my Aphis gossypii Surface tension Lauric acid Toxicity Malaysian Technical Universities Conference on Engineering and Technology (MUCET) 2012 organised by technical universities under the Malaysian Technical Universities Network (MTUN), 20th - 21st November 2012 at Hotel Seri Malaysia, Kangar, Perlis, Malaysia. The susceptibility of aphids to lauric acid, a type of middle-chain fatty acids, based pesticide formulation was investigated. The insecticidal properties of lauric acid based pesticide formulation against aphids were evaluated through the three main routes of exposure: topical application, leaf-dipping (ingestion) and inhalation. Surface tension dependent aphids toxicity was also investigated by measuring the surface tension value of each formulation prepared. The relationship of surface tension and formulation toxicity was then observed on aphid tested. The obtained results indicate that all tested formulations had insecticidal activity against tested aphids depending on exposure method and lauric acid concentration. The topical application method recorded 100% mortality rates compared to the other two methods. With topical application method, most of the aphids died soon after treatment. Toxicity symptoms from lauric acid to aphids included unusual abdominal contractions which caused quick loss of coordination and decreased activity, and finally dehydration and necrosis within 24 hours. Results from surface tension study revealed close connection between toxicity and surface tension. This might lead to the conclusion that toxicity was possibly related to aphid suffocation in the highly wettable solution. Results from this research also demonstrated that there were possibility that lauric acid do not only kill aphids by suffocation, but also through change of cuticle and cell permeability and desiccation that lead to speedy death due to the chemical nature of lauric acid. Overall, the results recommend that lauric acid based pesticide formulation has both physical and chemical mode of action on aphids. 2013-08-05T01:19:08Z 2013-08-05T01:19:08Z 2012-11-20 Working Paper p. 363-369 http://hdl.handle.net/123456789/27368 en Proceedings of the Malaysian Technical Universities Conference on Engineering and Technology (MUCET) 2012 Malaysian Technical Universities Network (MTUN)
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Aphis gossypii
Surface tension
Lauric acid
Toxicity
spellingShingle Aphis gossypii
Surface tension
Lauric acid
Toxicity
Sharifah Fathiyah, Syed Mohamad
Shahril, Mohamad
Azila, Abdul Aziz, Dr.
The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
description Malaysian Technical Universities Conference on Engineering and Technology (MUCET) 2012 organised by technical universities under the Malaysian Technical Universities Network (MTUN), 20th - 21st November 2012 at Hotel Seri Malaysia, Kangar, Perlis, Malaysia.
author2 azila@cheme.utm.my
author_facet azila@cheme.utm.my
Sharifah Fathiyah, Syed Mohamad
Shahril, Mohamad
Azila, Abdul Aziz, Dr.
format Working Paper
author Sharifah Fathiyah, Syed Mohamad
Shahril, Mohamad
Azila, Abdul Aziz, Dr.
author_sort Sharifah Fathiyah, Syed Mohamad
title The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
title_short The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
title_full The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
title_fullStr The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
title_full_unstemmed The susceptibility of aphids, Aphis gossypii glover to lauric acid based natural pesticide
title_sort susceptibility of aphids, aphis gossypii glover to lauric acid based natural pesticide
publisher Malaysian Technical Universities Network (MTUN)
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/27368
_version_ 1643795256274059264
score 13.222552

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