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Toxicity and uptake of methyl bromide in hybrid descendants of resistant and susceptibleSitophilus granarius(L.)

Authors
Journal
Journal of Stored Products Research
0022-474X
Publisher
Elsevier
Publication Date
Volume
12
Issue
4
Identifiers
DOI: 10.1016/0022-474x(76)90042-4

Abstract

Abstract Progeny of susceptible Sitophilus granarius repeatedly crossed with individuals from a resistant strain attained resistance to methyl bromide without selection with the fumigant and when this hybrid strain was subsequently subjected to methyl bromide pressure a higher degree of resistance than was present in the resistant parent developed. Resistant insects absorbed slightly less fumigant than susceptible insects in the first few hours of exposure but more in a 24 hr fumigation period. Resistance could not be related to either rate or degree of uptake of fumigant. The quantities of absorbed fumigant required to kill insects from both strains are given.

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