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Inhibition of egg development by phosphine in the cosmopolitan pest of stored products Liposcelis bostrychophila (Psocoptera: Liposcelididae)

Nayak, M.K. and Collins, P.J. and Pavic, H. and Kopittke, R.A. (2003) Inhibition of egg development by phosphine in the cosmopolitan pest of stored products Liposcelis bostrychophila (Psocoptera: Liposcelididae). Pest Management Science, 59 (11). pp. 1191-1196.

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Article Link(s): http://dx.doi.org/10.1002/ps.753

Publisher URL: http://www3.interscience.wiley.com/cgi-bin/jhome/68504529

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.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science, Plant Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:© John Wiley and Sons Ltd.
Keywords:Liposcelis bostrychophila; Psocoptera; phosphine; delayed hatching; eggs; stored products; resistance.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:07 May 2004
Last Modified:25 Oct 2011 23:04

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