Spectral reflectance values from multispectral images of cotton fields across two locations were compared with growth parameters, arthropod populations, and each other. Remotely sensed imagery was predictive of certain plant growth parameters such as height, total nodes, and numbers of bolls. Insect pest populations were generally too low for meaningful comparisons of reflectance values and density. There was a weak, but significant, relationship between the reflectance of values of some wavebands (e.g., 550 nm) and aphid density. Reflectance of 675 and 695 nm wavebands were highly correlated with each other. The strength of the relationships between other wavebands varied, depending upon whether comparisons were done within or across locations. Individual reflectance values of wavebands generally correlated with themselves for imagery collected on different dates; however, the strength of these relationships was variable.