Acaricidal activity against Panonychus citri of a ginkgolic acid from the external seed coat of Ginkgo biloba

An acaricidal substance extracted from the external seed coat of Ginkgo biloba L. was identified by UV (ultraviolet), IR (infrared), EI-MS (electron impact ion source mass spectrometry), 1H NMR (nuclear magnetic resonance) and 13C NMR as 6-[(Z)-10-heptadecenyl]-2-hydroxybenzoic acid (compound 1). La...

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Bibliographic Details
Published in:Pest management science 2006-03, Vol.62 (3), p.283-287
Main Authors: Pan, W, Luo, P, Fu, R, Gao, P, Long, Z, Xu, F, Xiao, H, Liu, S
Format: Article
Language:English
Subjects:
6-[(Z)-10-heptadecenyl]-2-hydroxybenzoic acid
acaricide
acaricides
Acids
anacardic acids
Animals
application rate
Biological and medical sciences
chemical constituents of plants
chemical structure
Citrus - parasitology
Citrus unshiu
contact toxicity
Control
cuticle damage
Flowers & plants
Fundamental and applied biological sciences. Psychology
Ginkgo biloba
Ginkgo biloba - chemistry
ginkgolic acids
insecticidal properties
Insecticides - chemistry
Insecticides - isolation & purification
mite control
Mites
Molecular Structure
Panonychus citri
Parasites
phenolic acids
Phytopathology. Animal pests. Plant and forest protection
plant extracts
plant pests
Protozoa. Invertebrates
purification
Salicylates - chemistry
Salicylates - isolation & purification
Seeds
spectral analysis
Toxicity
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Summary:An acaricidal substance extracted from the external seed coat of Ginkgo biloba L. was identified by UV (ultraviolet), IR (infrared), EI-MS (electron impact ion source mass spectrometry), 1H NMR (nuclear magnetic resonance) and 13C NMR as 6-[(Z)-10-heptadecenyl]-2-hydroxybenzoic acid (compound 1). Laboratory bioassay on citrus red mite, Panonychus citri (Mcg), showed that compound 1 possessed the following properties. (i) Powerful contact toxicity with an LC50 of 5.2 mg litre(-1) after 24 h that was similar to that of pyridaben (LC50 = 3.4 mg litre(-1)) and significantly superior to that of omethoate (LC50 = 122 mg litre(-1)). Furthermore, its LC90 was 13.4 mg litre(-1) after 24 h, which is significantly superior to both pyridaben (LC90 = 69.6 mg litre(-1)) and omethoate (LC90 = 453 mg litre(-1)). (ii) Quick-acting acaricidal activity. At identical concentrations, compound 1 was much faster-acting than pyridaben or omethoate. (iii) Compound 1 had strong corrosive action on the cuticle of P. citri but no phytotoxicity to plants.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.1152