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Bioactivity of essential oil from
Ailanthus altissima bark against 4 major stored-grain
insects
Jianhua Lu* and Shuhui Wu
School of Food Science and
Technology, Henan University of Technology, Zhengzhou
450052, China.
*Corresponding author.
E-mail:
jianhlv@yahoo.com.cn.
Accepted 17 December, 2009 |
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The
essential oil was extracted
by Soxhlet method
with anhydrous
diethyl ether from Ailanthus altissima Swingle (Sapindales:
Simaroubaceae) bark,
a traditional Chinese
herbal plant and its repellent, contact and fumigant
activities were investigated
against four major stored grain insects. A. altissima
bark oil significantly repelled Tribolium castaneum (Herbst)
(Coleoptera: Tenebrionidae), Oryzaephilus surinamensis
(Linnaeus) (Coleoptera: Silvanidae), Sitophilus
oryzae (Linnaeus) (Coleoptera: Curculionidae) and
Liposcelis paeta Pearman (Psocoptera: Liposcelididae)
adults, with the
repellency value
reaching IV
grade or stronger during the whole exposure period. A.
altissima bark oil also pos-sessed strong contact
toxicity on S. oryzae adults which gradually enhanced
with increased exposure time and the corrected percentage
mortality reached 76.5% after 72 h treatment. Furthermore,
A. altissima bark oil
had high fumigant activity against O. surinamensis
and S. oryzae adults with the corrected percentage
mortality 99.3 and 81.9% within 24 h, respectively.
Key words:
Ailanthus altissima bark, essential oil, stored-grain
insects, bioactivity. |
