Investigation of the contents of three main bio-active substances in the seed oil of the neem trees planted in Ninh Thuan province, Vietnam.

Authors

  • Vu Van Do VAST
  • Nguyen Tien Thang
  • Ngo Ke Suong

DOI:

https://doi.org/10.15625/0866-7160/v27n3.5272

Abstract

By the cold pressing method of the neem (Azadirachta indica A. Juss) seed kernels at 40oC, we have received 32.6% neem oil and 67.4% neem cake. The results of the analysis on high performance liquid chromatography (HPLC) and gas chromatography (GC) showed that there were three main bio-active substances: azadirachtin, salanin and nimbin in the neem oil and neem cake; the azadirachtin contents in the neem cake were 6 times higher than that in the neem oil. The neem oil consisted of 9 saturated and unsaturated fatty acids; among them, the oleic acid (C18=)contents were the highest (43%-48%) and the lauric acid (C12) contents were the lowest (trace-0.12%).

The 15 pestiside formulations from the neem oil and  neem oil with Bt  were made and tested on Heliothis armigera and Plutella xylostella. The results showed that the neem oil itself and neem oil with Bt all affected to kill actively the insects.

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Published

11-11-2014

How to Cite

Do, V. V., Thang, N. T., & Suong, N. K. (2014). Investigation of the contents of three main bio-active substances in the seed oil of the neem trees planted in Ninh Thuan province, Vietnam. Academia Journal of Biology, 27(3), 61–65. https://doi.org/10.15625/0866-7160/v27n3.5272

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