An evaluation of multi-spectral responses on selected turfgrass species

Multi-spectral measurements have been shown to detect plant stress in numer ous species. Leaf chlorophyll concentration may change in response to alter ed plant physiological functions due to plant stress; this may also be dete cted by reflectance data. This research was conducted on established held p lots of creeping bentgrass (Agrostis palustris Huds.) and bemudagrass (Cyno don dactylon L x C, transvaalensis Burtt-Davy) at the University of Georgia turfgrass rhizotron in Athens, GA. Multi-spectral data and visual ratings of quality, colour, and density were taken simultaneously on the two specie s in October 1997. Reflectance was greater in the C, bemudagrass than the C , bentgrass, greater in the visible range in bentgrass plots receiving N at 16.1 kg ha(-1) and greater from 2 DAT on in bermudagrass plots receiving g lyphosate.