Premium
Dosage consistency is the key factor in avoiding evolution of resistance to phosphine and population increase in stored‐grain pests
Author(s) -
Shi Mingren,
Collins Patrick J,
RidsdillSmith T James,
Emery Robert N,
Renton Michael
Publication year - 2013
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.3457
Subject(s) - pest analysis , population , biology , pesticide , pest control , resistance (ecology) , consistency (knowledge bases) , toxicology , agronomy , microbiology and biotechnology , mathematics , botany , medicine , environmental health , geometry
BACKGROUND 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.RESULTS 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.CONCLUSION 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