Nematicidal Activity of Cassia and Cinnamon Oil Compounds and Related Compounds toward Bursaphelenchus xylophilus (Nematoda: Parasitaphelenchidae)

The nematicidal activity of two cassia, Cinnamomum cassia, oils (Especial and true), four cinnamon, Cinnamomum zey-lanicum, oils (technical, #500, bark and green leaf), and their compounds (e.g., trans-cinnamaldehyde and trans-cinnamic acid) toward adult Bursaphelenchus xylophilus was examined by a...

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Bibliographic Details
Published in:Journal of nematology 2007-03, Vol.39 (1), p.31-36
Main Authors: Kong, J.O, Lee, S.M, Moon, Y.S, Lee, S.G, Ahn, Y.J
Format: Article
Language:English
Subjects:
aldehydes
botanical nematicides
Bursaphelenchus xylophilus
Cassia
Cassia cassia
cassia oil
chemical constituents of plants
cinnamic acid
Cinnamomum verum
Contributed Paper
essential oils
lethal dose 50
nematicidal properties
pine wilt disease
Pinus
structure-activity relationships
toxicity
trans-cinnamaldehyde
tree diseases
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Summary:The nematicidal activity of two cassia, Cinnamomum cassia, oils (Especial and true), four cinnamon, Cinnamomum zey-lanicum, oils (technical, #500, bark and green leaf), and their compounds (e.g., trans-cinnamaldehyde and trans-cinnamic acid) toward adult Bursaphelenchus xylophilus was examined by a direct contact bioassay. Results were compared with those of 34 related compounds. As judged by 24-hour LC(50) values, two cassia oils (0.084-0.085 mg/ml) and four cinnamon oils (0.064-0.113 mg/ml) were toxic toward adult B. xylophilus. Of 45 test compounds, trans-cinnamaldehyde (0.061 mg/ml) was the most active nematicide, followed by ethyl cinnamate, alpha-methyl-trans-cinnamaldehyde, methyl cinnamate and allyl cinnamate (0.114-0.195 mg/ml). Potent nematicidal activity was also observed with 4-methoxycinnamonitrile, trans-4-methoxycinnamaldehyde, trans-2-methoxy-cinnamaldehyde, ethyl alpha-cyanocinnamate, cinnamonitrile and cinnamyl bromide (0.224-0.502 mg/ml). Structure-activity relationships indicate that structural characteristics, such as types of functional groups, saturation and carbon skeleton, appear to play a role in determining the toxicities to adult B. xylophilus. Cassia and cinnamon oils and test compounds described merit further study as potential nematicides or leads for the control of pine wilt disease caused by B. xylophilus.
ISSN:0022-300X
2640-396X