Pest Management Science (2008) 64, 1314-1322

Raul Narciso C. Guedes, James F. Campbell, Frank H. Arthur, George P. Opit, Kun Yan Zhu and James E. Throne (2008)
Acute lethal and behavioral sublethal responses of two stored-product psocids to surface insecticides
Pest Management Science 64 (12), 1314-1322
Abstract: BACKGROUND: The psocids Liposcelis bostrychophila Badonnel and L. entomophila (Enderlein) (Liposcelididae) are emerging pests of stored products. Although their behavior, particularly their high mobility, may contribute to the reported relatively low efficacy of insecticides against them, studies to investigate this have not been conducted. The present study aimed to assess the label rate efficacy of three commercial insecticides (ß-cyfluthrin, chlorfenapyr and pyrethrins) applied on concrete surfaces against L. bostrychophila and L. entomophila, and also their sublethal effect on the mobility of these species.
RESULTS: The synthetic insecticides ß-cyfluthrin and chlorfenapyr showed high short-term efficacy (LT₉₅ < 15 h) against both psocid species, unlike the natural pyrethrins (LT₉₅ > 4 days). Liposcelis bostrychophila was slightly more tolerant (>1.2×) than L. entomophila to all three insecticides. Behavioral assays with fully sprayed and half-sprayed concrete arenas indicated that the insecticides reduced the mobility of both species. Pyrethrins seem to elicit weak repellence in L. bostrychophila.
CONCLUSION: ß-Cyfluthrin and chlorfenapyr were effective against both psocid species, but not pyrethrins. The mobility of both species does not seem to play a major role in the differential selectivity observed, but the lower mobility of L. bostrychophila may be a contributing factor to its higher insecticide tolerance.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Raul Narciso C. Guedes, James E. Throne, George P. Opit, Frank H. Arthur, Kun Yan Zhu, James F. Campbell

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.
	Liposcelis bostrychophila
	Liposcelis entomophila