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Please use this identifier to cite or link to this item: http://anchan.lib.ku.ac.th/agnet/handle/001/5218

ARN: TH201200005136
Authors: Ekkarat Kaewnang-O
Aran Ngampongsai
Sanan Subhadhirasakul
Teerapol Srichana
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Authors' affiliation: Prince of Songkla University. Hat Yai Campus, Songkhla (Thailand). Faculty of Natural Resources. Department of Pest Management
Prince of Songkla University. Hat Yai Campus, Songkhla (Thailand). Faculty of Natural Resources. Department of Pest Management
Prince of Songkla University. Hat Yai Campus, Songkhla (Thailand). Faculty of Traditional Thai Medicine
Prince of Songkla University. Hat Yai Campus, Songkhla (Thailand). Faculty of Pharmaceutical Sciences. Department of Pharmaceutical Technology
Authors' affiliation (Thai): -
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Title: Toxicity of fixed oil and crude extract from sa-dao-thiam, Azadirachta excelsa (Jack) seed kernel to Aedes aegypti (L.)
Corporate authors (Thai): Prince of Songkla University. Hat Yai Campus, Songkhla (Thailand)
Issue Date: 2011
Language: eng
Keywords: Azadirachta excelsa
Aedes aegypti
Toxicity
Development
Histology
Subject Classification(ASC): H20
F60
AGROVOC: Azadirachta
Azadirachta
Aedes aegypti
Aedes aegypti
Toxicity
ความเป็นพิษ
Residues
พิษตกค้าง
Mortality
การตาย
Abstract: Larvicidal activity of various concentrations of fixed oil and crude extract from sa-dao-thiam, Azadirachta excelsa (Jack) seed kernel was assayed on an Aedes aegypti (L.) test population under controlled laboratory conditions. Concentration levels of responses at 24, 48, 72, and 96 hrs were evaluated. The LC50 values of the fixed oil and the crude extract were 403.6 and 518.7 ppm, respectively. One hundred percent mortality in 24 hrs-post treatment was achieved at 2,000 and 4,000 ppm for the oil and crude extract, respectively. It suggested that the oil is more toxic to Ae. aegypti larvae than the crude extract. Further investigation suggested the occurrence of molting inhibition of Ae. aegypti larvae by the fixed oil and crude extract as indicated by the small number of emerged adults. In addition, histological study suggested that damages on the epithelial cells of the midgut could result from the effects of the oil and crude extract. Hypertrophy and degeneration of the epithelial cells were observed, resulting in a presence of some cytoplasmic material in the alimentary canal. Further studies should be taken into account to identify their stability and residual activity of these products under field conditions.
Right: ลิขสิทธิ์เป็นของเจ้าของบทความแต่เพียงผู้เดียว
สงวนลิขสิทธิ์ตามพระราชบัญญัติลิขสิทธิ์ พ.ศ. 2537
เอกสารนี้สงวนไว้สำหรับการใช้งานเพื่อการศึกษาเท่านั้น ไม่อนุญาตให้นำไปใช้ประโยชน์ด้านการค้า ไม่ว่ากรณีใดๆ ทั้งสิ้น อีกทั้งห้ามมิให้ดัดแปลงเนื้อหา และต้องอ้างอิงถึงเจ้าของเอกสารทุกครั้งที่มีการนำไปใช้
Type: Collection
ISSN: ISSN 0125-3395
Appears in Collections:Faculty of Natural Resources

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