Pest Management Science (2003) 59, 1191-1196

Manoj K. Nayak, Patrick J. Collins, Hervoika Pavic and Rosemary A. Kopittke (2003)
Inhibition of egg development by phosphine in the cosmopolitan pest of stored products Liposcelis bostrychophila (Psocoptera: Liposcelididae)
Pest Management Science 59 (11), 1191-1196
Abstract: Phosphine-induced delay in development of eggs was investigated as a mechanism of resistance to this fumigant in Liposcelis bostrychophila Badonnel. One-day-old eggs of a susceptible and a strongly resistant strain of L bostrychophila were exposed to a range of phosphine concentrations for 6 days at 30 (±1) °C and 70 (±2)% RH. Delay in mean hatching period occurred in both susceptible and resistant eggs, although it was more pronounced in the latter. A maximum delay of 2.65 days was recorded for eggs of the susceptible strain at 0.01 mg litre^-1 (the highest concentration at which eggs survived) and 13.39 days for the resistant strain at 1 mg litre^-1 (the highest concentration tested). Delay in egg development time was positively correlated with increasing phosphine concentration. Our results reveal that the most successful strategy to control resistant L. bostrychophila is to apply relatively low concentrations of phosphine for extended exposure times (eg 0.05 mg litre^-1 for 16 days) that allow all eggs to hatch to the much less tolerant nymph stage.
(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): Manoj K. Nayak, Patrick J. Collins

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Liposcelis bostrychophila