Abstract

Data on the spread of Solenopsis invicta Buren in the U.S. were gathered for the period 1965–1976. Weather bureau information was summarized to account for climatic conditions actually or potentially encountered by S. invicta . Using statistical and modeling techniques, the range expansion of S. invicta has been related to combinations of climatic variables. A predictive model is presented and we predict that the red imported fire ant will spread to 18 additional counties in Texas during the next 10 years.

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