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. 2007 Mar;71(2):131-46.
doi: 10.1016/j.tpb.2006.08.006. Epub 2006 Sep 20.

A situation in which a local nontoxic refuge promotes pest resistance to toxic crops

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A situation in which a local nontoxic refuge promotes pest resistance to toxic crops

Jemal Mohammed-Awel et al. Theor Popul Biol. 2007 Mar.

Abstract

In order to delay the development of pest resistance to genetically engineered insecticidal crop varieties, it is current practice to grow "refugees" of non-toxic plants close to insecticidal crops. We model such a toxic/nontoxic crop complex as an open system with a small stream of toxin-susceptible immigrants. We find that, for intermediate values of the dominance of a pest gene for resistance to the toxin, the local refuge can spoil the benefit that is provided by the immigrant stream. We provide formulas for some important boundaries in parameter space.

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