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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Institution:	Universiti Malaysia Perlis
Language:	English

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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

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

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