Effects of some materials extracted fromAjuga species on the larvae ofHyphantria cunea and its natural enemies |
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| Authors: | Chi Defu Darvas Bela Rafael Ocete Rubio Jin Chuanling |
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| Institution: | (1) Northeast Forestry University, 150040 Harbin, P. R. China;(2) Plant Protection Institute, Hungarian Academy of Sciences, P.O. Box 102, h-1525 Budapest, Hungary;(3) Applied Zoology Department, Biological Faculty, Sevilla University, Sevilla, Spain;(4) The Quarantine and Control Station, 110000 Liaoning Province, P. R. China |
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| Abstract: | Six kinds of extracts drawn fromAjuga multiflora andA. multiflora var.brevispicata and A. multiflora var.serotina using methanol and acetone were used in this experiment to test their killing activity to the second instar larvae ofHyphantria cunea and their influence on its natural enemies. The average death rate caused by those extracts on the second instar larvae was
85.70%. The mortality rate caused by the extracts drawn with methanol was from 88.89% to 96.33%, which was significantly higher
than that caused by acetone extracts. Those extracts were safe toTrichogramma dendrolimi, Coccinella septempunctata, the natural enemies ofH. cunea. We did not found any evidence shown that those extracts had any influence the emergence and the development ofT. dendrolimi. Those methanolic extracts gotten fromA. multiflora andA. multiflora var.brevispicata had no significant effects on the mortality of the larvae and adults ofC. septempunctata. Those extracts could be used in the control ofH. cunea safely.
The research was sponsored by National Nature Science Fundation (39470586)
(Responsible Editor: Chai Ruihai) |
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| Keywords: | Ajuga multiflora Ajuga multiflora var brevispicata A multiflora var serotina Hyphantria cunea Extracts Natural enemy Trichogramma dendrolimi Coccinella septempunctata Control |
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