Assessment of residual bio-efficacy and persistence of Ipomoea cairica plant extract against Culex quinquefasciatus Say mosquito
Specification on residual action of a possible alternative insecticide derived from plant materials is important to determine minimum interval time between applications and the environmental persistence of the biopesticides. The objective of this study is to evaluate crude acethonilic extract of Ip...
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| Format: | Article |
| Language: | English |
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Research Gate
2014
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| Online Access: | http://ir.unimas.my/id/eprint/9809/ http://ir.unimas.my/id/eprint/9809/1/Zaharah.pdf |
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| author | Thiagaletchumi, Maniam Wan Fatma, Zaharah Ahbi Rami, Rattanam Nik, Fadzly Hamady, Dieng Abu Hassan, Ahmad Sazaly, AbuBakar |
| author_facet | Thiagaletchumi, Maniam Wan Fatma, Zaharah Ahbi Rami, Rattanam Nik, Fadzly Hamady, Dieng Abu Hassan, Ahmad Sazaly, AbuBakar |
| author_sort | Thiagaletchumi, Maniam |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Specification on residual action of a possible alternative insecticide derived from plant materials is important to determine minimum interval time between applications and
the environmental persistence of the biopesticides. The objective of this study is to evaluate crude acethonilic extract of Ipomoea cairica leaves for its residual and persistence effects against Culex quinquefasciatus larvae. Wild strain of Cx. quinquefasciatus larvae were used for the purpose of the study. Two test designs, replenishment of water and without replenishment of water were carried out. For the first design, a total of 10ml of test solution containing Ip. cairica extracts was replenished daily and replaced with 10ml of distilled water. For the second design, treatment water was maintained at 1500ml and only evaporated water was refilled. Larval mortality was recorded at 24 hours post-treatment after each introduction period and trials were terminated when mortality rate falls below 50%. Adult emergences from survived larvae were observed and number of survivals was recorded. For
the non-replenishment design, mortality rate significantly reduced to below 50% after 28
days, meanwhile for replenishment of water declined significantly after 21 days (P < 0.05).
There was no adult emergence observed up to seven days for non-replenishment and first two
days for replenishment of water design. The short period of residual effectiveness of crude
acethonilic extract of Ip. cairica leaves with high percentage of larval mortality on the first
few days, endorses fewer concerns of having excess residues in the environment which may
carry the risk of insecticide resistance and environmental pollution. |
| first_indexed | 2025-11-15T06:26:59Z |
| format | Article |
| id | unimas-9809 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:26:59Z |
| publishDate | 2014 |
| publisher | Research Gate |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-98092021-06-29T16:26:10Z http://ir.unimas.my/id/eprint/9809/ Assessment of residual bio-efficacy and persistence of Ipomoea cairica plant extract against Culex quinquefasciatus Say mosquito Thiagaletchumi, Maniam Wan Fatma, Zaharah Ahbi Rami, Rattanam Nik, Fadzly Hamady, Dieng Abu Hassan, Ahmad Sazaly, AbuBakar GE Environmental Sciences Q Science (General) Specification on residual action of a possible alternative insecticide derived from plant materials is important to determine minimum interval time between applications and the environmental persistence of the biopesticides. The objective of this study is to evaluate crude acethonilic extract of Ipomoea cairica leaves for its residual and persistence effects against Culex quinquefasciatus larvae. Wild strain of Cx. quinquefasciatus larvae were used for the purpose of the study. Two test designs, replenishment of water and without replenishment of water were carried out. For the first design, a total of 10ml of test solution containing Ip. cairica extracts was replenished daily and replaced with 10ml of distilled water. For the second design, treatment water was maintained at 1500ml and only evaporated water was refilled. Larval mortality was recorded at 24 hours post-treatment after each introduction period and trials were terminated when mortality rate falls below 50%. Adult emergences from survived larvae were observed and number of survivals was recorded. For the non-replenishment design, mortality rate significantly reduced to below 50% after 28 days, meanwhile for replenishment of water declined significantly after 21 days (P < 0.05). There was no adult emergence observed up to seven days for non-replenishment and first two days for replenishment of water design. The short period of residual effectiveness of crude acethonilic extract of Ip. cairica leaves with high percentage of larval mortality on the first few days, endorses fewer concerns of having excess residues in the environment which may carry the risk of insecticide resistance and environmental pollution. Research Gate 2014 Article NonPeerReviewed text en http://ir.unimas.my/id/eprint/9809/1/Zaharah.pdf Thiagaletchumi, Maniam and Wan Fatma, Zaharah and Ahbi Rami, Rattanam and Nik, Fadzly and Hamady, Dieng and Abu Hassan, Ahmad and Sazaly, AbuBakar (2014) Assessment of residual bio-efficacy and persistence of Ipomoea cairica plant extract against Culex quinquefasciatus Say mosquito. Tropical Biomedicine, 31 (3). pp. 466-476. ISSN 0127-5720 http://www.msptm.org/files/466_-_476_Wan_Fatma_Zuharah.pdf |
| spellingShingle | GE Environmental Sciences Q Science (General) Thiagaletchumi, Maniam Wan Fatma, Zaharah Ahbi Rami, Rattanam Nik, Fadzly Hamady, Dieng Abu Hassan, Ahmad Sazaly, AbuBakar Assessment of residual bio-efficacy and persistence of Ipomoea cairica plant extract against Culex quinquefasciatus Say mosquito |
| title | Assessment of residual bio-efficacy and persistence of
Ipomoea cairica plant extract against Culex quinquefasciatus
Say mosquito |
| title_full | Assessment of residual bio-efficacy and persistence of
Ipomoea cairica plant extract against Culex quinquefasciatus
Say mosquito |
| title_fullStr | Assessment of residual bio-efficacy and persistence of
Ipomoea cairica plant extract against Culex quinquefasciatus
Say mosquito |
| title_full_unstemmed | Assessment of residual bio-efficacy and persistence of
Ipomoea cairica plant extract against Culex quinquefasciatus
Say mosquito |
| title_short | Assessment of residual bio-efficacy and persistence of
Ipomoea cairica plant extract against Culex quinquefasciatus
Say mosquito |
| title_sort | assessment of residual bio-efficacy and persistence of
ipomoea cairica plant extract against culex quinquefasciatus
say mosquito |
| topic | GE Environmental Sciences Q Science (General) |
| url | http://ir.unimas.my/id/eprint/9809/ http://ir.unimas.my/id/eprint/9809/ http://ir.unimas.my/id/eprint/9809/1/Zaharah.pdf |