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Developments in phosphine resistance in China and possible implications for Australia

Nayak, M.K. and Collins, P.J. and Pavic, H. and Cao, Y. (2003) Developments in phosphine resistance in China and possible implications for Australia. In: Stored grain in Australia 2003. Proceedings of the Australian Postharvest Technical Conference, Canberra., 25-27 June 2003, CSIRO Stored Grain Research Laboratory, Canberra.

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Publisher URL: http://www.publish.csiro.au

Abstract

Resistance to phosphine was characterised in strains of rice weevil, Sirophilus oryzae, and the psocids Liposcelis entomophila and L. decolor from China and Australia. Mixed-age cultures (containing all life stages) of insects were tested using a flow-through apparatus. The criterion of response was 'time to population extinction' defined as the exposure period, in days, at which 100% mortality of adults and no live progeny were achieved. Chinese S. oryzae took 11 and 7 days for population extinction at 200 and 700 ppm phosphine, respectively, compared with the Australian strain, which was controlled in 7 and 5 days, respectively. Similarly, the Chinese strains L. Enfornophila and L. decolor were generally more difficult to control than the corresponding Australian strains. The Chinese strains of L. decolor showed resistance levels stronger than any grain storage insect pest species so far detected in Australia. This research allows us to evaluate the likely significance of potential new resistance to the Australian grain industry and to prepare effective fumigation dosages and resistance management strategies to combat new strong resistances before they emerge here.

Item Type:Conference or Workshop Item (Paper)
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version may be available via Publisher’s website.
Keywords:Phosphine; resistance; rice weevil; Sirophilus oryzae; fumigation.
Subjects:Science > Zoology > Invertebrates > Insects
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:08 Jul 2004
Last Modified:25 Oct 2011 23:02

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