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Remote sensing of crop water stress using infrared radiation thermometers is one of the several important remote sensing applications. Remotely-sensed infrared canopy temperatures provide an efficient method for rapid, nondestructive monitoring of whole plant response to water stress. A logical extension of this technology is the use of canopy temperatures in screening crop genotypes for drought resistance. The potntial of using canopy temperatures in evaluating the genotypic response to drought is reviewed in this paper.
