Pest Management Science (2020) 76, 405-414

Gwang H. Roh, Xiaaojie Zhou, Yansu Wang, Steven C. Cermak, James A. Kenar, Alexander Lehmann, Baoyu Han, David B. Taylor, Xiaopeng Zeng, Chung Gyoo Park, Gary J. Brewer and Junwei J. Zhu (2020)
Spatial repellency, antifeedant activity and toxicity of three medium chain fatty acids and their methyl esters of coconut fatty acid against stable flies
Pest Management Science 76 (1), 405-414
Abstract:
BACKGROUND
Stable flies are one of the most detrimental arthropod pests to livestock. With changing climates and agronomic practices, they expand their roles as pests and disease vectors as well. Their painful bites reduce livestock productivity, annoy companion animals, and interfere with human recreational activities. Current management technologies are unable to effectively control stable flies. The present study reports new results concerning the contact, spatial repellency, and toxicity of a bio-based product, coconut fatty acid and their methyl ester derivatives of free fatty acids of C_8:0, C_10:0 and C_12:0 to stable flies.
RESULTS
Three medium chain fatty acid methyl esters (C_8:0, C_10:0 and C_12:0) showed strong antifeedant activity against stable flies and their strengths were dose-dependent. Only the C_8:0 acid, C_8:0- and C_10:0 methyl esters elicited significant antennal responses. Laboratory single cage olfactometer bioassays revealed that coconut fatty acid and C_8:0 methyl ester displayed active spatial repellency. All three methyl esters showed strong toxicity against stable flies.
CONCLUSION
Antifeedant activity is the main method through which coconut fatty acid deters stable fly blood-feeding. The C_8:0, C_10:0 and C_12:0 methyl esters act not only as strong antifeedants, but also possess strong toxicity against stable fly adults. Limited spatial repellency was observed from coconut fatty acid and C_8:0 methyl ester.
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Link to article at publishers website
Database assignments for author(s): David B. Taylor, Chung Gyoo Park

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Stomoxys calcitrans