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Potential of imidacloprid to control four species of psocids (Psocoptera: Liposcelididae) infesting stored grain

Nayak, M.K. and Daglish, G.J. (2006) Potential of imidacloprid to control four species of psocids (Psocoptera: Liposcelididae) infesting stored grain. Pest Management Science, 62 (7). pp. 646-650.

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Article Link(s): http://dx.doi.org/10.1002/ps.1220

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

Abstract

The effectiveness of the neonicotinoid insecticide imidacloprid was evaluated against four psocid pests of stored grain. This research was undertaken because of the growing importance of psocids in stored grain and the need to identify methods for their control. The mortality and reproduction of adults of Liposcelis bostrychophila Badonnel, L. entomophila (Enderlein), L. decolor (Pearman) and L. paeta Pearman in wheat treated with imidacloprid were determined. There were five application rates (0.5, 1, 2, 5 and 10 mg AI kg -1 grain) and an untreated control. There were significant effects of application rate on both adult mortality and reproduction for all four species, but the effect of imidacloprid was sometimes more pronounced on reproduction. Imidacloprid was most effective against L. bostrychophila, with 100% adult mortality after 7 d at 5 mg AI kg-1, 14 d at 2 mg AI kg-1 and 28 d at 0.5 and 1 mg AI kg-1. No live progeny were produced at 2 mg AI kg-1. For L. decolor, there was 100% adult mortality after 28 d at 10 mg AI kg-1 and no live progeny were produced at 2 mg AI kg-1. For L. entomophila, there was 100% adult mortality after 14 d at 10 mg AI kg-1 and 28 d at 2 and 5 mg AI kg-1. No live progeny were produced at 10 mg AI kg-1. At 10 mg AI kg-1 there was 100% mortality of L. paeta adults after 28 d exposure and no live progeny developed. Because reproduction at some application rates occurred only in the first 14 d of exposure, it is concluded that the application rate leading to population extinction was 1 mg AI kg-1 for L. bostrychophila, 2 mg AI kg-1 for L. decolor and L. entomophila and 5 mg AI kg -1 for L. paeta. This study shows that imidacloprid has potential as a grain protectant to control all four Liposcelis species in stored grain.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Society of Chemical Industry.
Keywords:Imidacloprid; insecticide; Liposcelis; psocids; stored grain.
Subjects:Science > Zoology > Invertebrates > Insects
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:24 Feb 2009 05:12
Last Modified:25 Oct 2011 23:07

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