Effect of fraxinellone on growth and digestive physiology of Asian corn borer, Ostrinia furnacalis Guenee

A limonoid, fraxinellone significantly reduced the relative growth rate, food consumption rate as well as the efficiency of conversion of ingested food of the Asian corn borer, Ostrinia furnacalis when incorporated into artificial diets at concentration of 10 ppm and above. After being fed with diet...

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Bibliographic Details
Published in:Pesticide biochemistry and physiology 2008-06, Vol.91 (2), p.122-127
Main Authors: Liu, Zhi Long, Ho, Shuit Hung, Goh, Swee Hock
Format: Article
Language:English
Subjects:
Amylase
amylases
biopesticides
cytochrome P-450
Degraded limonoids
Detoxification enzyme
Digestive enzyme
dosage
enzyme activity
feed conversion
feed intake
Fraxinellone
insect growth
insect pests
larvae
limonoids
mechanism of action
midgut
Ostrinia furnacalis
plant pests
Protease
proteinases
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Summary:A limonoid, fraxinellone significantly reduced the relative growth rate, food consumption rate as well as the efficiency of conversion of ingested food of the Asian corn borer, Ostrinia furnacalis when incorporated into artificial diets at concentration of 10 ppm and above. After being fed with diets that contained fraxinellone for 24 h, the larval midguts of O. furnacalis possess significantly lower activities of α-amylase and non-specific proteases and higher activities of cytochrome P450s. In vitro, the compound did not inhibit the activities of α-amylase and non-specific proteases extracted from the larval midguts. The modes of action of fraxinellone against the insect were discussed.
ISSN:0048-3575
1095-9939
DOI:10.1016/j.pestbp.2008.03.003