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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Malaysian Technical Universities Network (MTUN)
2013
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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) |
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Aphis gossypii Surface tension Lauric acid Toxicity |
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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 |
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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 |
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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 |
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1643795256274059264 |
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13.209306 |