Allelopathic effects of essential oil from  × .  on pathogenic fungi and pest insects

doi:10.1007/s11461-008-0036-5

Front. For. China

2008, Vol. 3

Issue (2) : 232-236 https://doi.org/10.1007/s11461-008-0036-5

Allelopathic effects of essential oil from × . on pathogenic fungi and pest insects

LIU Xiaoxiang¹, CHEN Qiubo², WANG Zhenhui³, XIE Longlian⁴, XU Zhi⁵

1.Library of South China University of Tropical Agriculture; 2.Tropical Crops Germplasm Resources Research Institute, Chinese Academy of Tropical Agricultural Sciences; 3.Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences; 4.Sci-Tech Information Research Institute, Chinese Academy of Tropical Agricultural Sciences; 5.Analytical and Testing Centre, Chinese Academy of Tropical Agricultural Sciences;

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Abstract This study on the allelopathic effects and chemical components of the essential oil from Eucalyptus grandis × E. urophylla shows that the leaf oil emulsion of E. grandis × E. urophylla can inhibit the proliferation of pathogenic fungi Fusarium oxysporum, Pyriculerie grisea, Glorosprium musa rum and Phytophthora capsici. Pupation and feeding of the pest insects Spodopteralitura Fabricius and Helicoverpa armigera Hubner are shown to be affected with restraining effects which increase with the increasing levels of oil concentration. A GC/MS analysis of the leaf oil indicated that the main components, with a relative content of ≥3%, were allo-ocimene (43.22%), ?-pinene (13.63%), ?-terpinene (5.49%), (E)-3,7-dimethyl-2,6-octadien-1-ol (3.58%), ?-fenchyl alcohol (4.58%), and 2-amino-3,5-dicyano-6-(4-methoxyphenoxy)-pyridine (3.67%). Terpenes played an important role in the inhibitory effects of E. grandis × E. urophylla essential oil on pathogenic fungi and pest insects. Poor biodiversity of eucalyptus plantations is a function of allelopathy.

Issue Date: 05 June 2008

Cite this article:

CHEN Qiubo,LIU Xiaoxiang,WANG Zhenhui, et al. Allelopathic effects of essential oil from × . on pathogenic fungi and pest insects[J]. Front. For. China, 2008, 3(2): 232-236.

URL:

https://academic.hep.com.cn/ffc/EN/10.1007/s11461-008-0036-5
https://academic.hep.com.cn/ffc/EN/Y2008/V3/I2/232

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