Dosage consistency is the key factor in avoiding evolution of resistance to phosphine and population increase in stored‐grain pests. Issue 9 (3rd January 2013)

• Record Type: Journal Article
• Authors: Shi, Mingren; Collins, Patrick J; Ridsdill‐Smith, T James; Emery, Robert N; Renton, Michael
• Is Part Of: Pest management science. Volume 69:Issue 9(2013:Sep.)
• Page Start: 1049
• Page End: 1060
• Publication Date: 2013-01-03
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3457
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="ps3457-sec-0001" sec-type="section"> <title>BACKGROUND</title> <p> <bold>Control of pests in stored grain and the evolution of resistance to pesticides are serious problems worldwide. A stochastic individual‐based two‐locus model was used to investigate the impact of two important issues, the consistency of pesticide dosage through the storage facility and the immigration rate of the adult pest, on overall population control and avoidance of evolution of resistance to the fumigant phosphine in an important pest of stored grain, the lesser grain borer.</bold> </p> </sec> <sec id="ps3457-sec-0002" sec-type="section"> <title>RESULTS</title> <p> <bold>A very consistent dosage maintained good control for all immigration rates, while an inconsistent dosage failed to maintain control in all cases. At intermediate dosage consistency, immigration rate became a critical factor in whether control was maintained or resistance emerged.</bold> </p> </sec> <sec id="ps3457-sec-0003" sec-type="section"> <title>CONCLUSION</title> <p> <bold>Achieving a consistent fumigant dosage is a key factor in avoiding evolution of resistance to phosphine and maintaining control of populations of stored‐grain pests; when the dosage achieved is very inconsistent, there is likely to be a problem regardless of immigration rate. © 2012 Society of Chemical Industry</bold> </p> </sec> </abstract>