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Resistance to phosphine in Sitophilus oryzae in Australia: A national analysis of trends and frequencies over time and geographical spread

Holloway, J.C. and Falk, M.G. and Emery, R.N. and Collins, P.J. and Nayak, M.K. (2016) Resistance to phosphine in Sitophilus oryzae in Australia: A national analysis of trends and frequencies over time and geographical spread. Journal of Stored Products Research, 69 . pp. 129-137. ISSN 0022474X

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Article Link(s): http://dx.doi.org/10.1016/j.jspr.2016.07.004

Abstract

In Australia, along with many other parts of the world, fumigation with phosphine is a vital component in controlling stored grain insect pests. However, resistance is a factor that may limit the continued efficacy of this fumigant. While strong resistance to phosphine has been identified and characterised, very little information is available on the causes of its development and spread. Data obtained from a unique national resistance monitoring and management program were analysed, using Bayesian hurdle modelling, to determine which factors may be responsible. Fumigation in unsealed storages, combined with a high frequency of weak resistance, were found to be the main criteria that led to the development of strong resistance in Sitophilus oryzae. Independent development, rather than gene flow via migration, appears to be primarily responsible for the geographic incidence of strong resistance to phosphine in S. oryzae. This information can now be utilised to direct resources and education into those areas at high risk and to refine phosphine resistance management strategies.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Phosphine resistance Sitophilus oryzae Fumigation Bayesian hurdle modelling Grain storage
Subjects:Science > Entomology
Agriculture > Agriculture (General) > Storage
Plant culture > Field crops
Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Deposited On:08 Aug 2016 03:52
Last Modified:15 Aug 2016 23:03

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