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23 June 1983 Low-Cost,Portable Multispectral Radiometer For Assessment Of Onset And Severity Of Foliar Disease Of Barley
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Abstract
A low-cost, hand-held multiband radiometer was used to measure reflected sunlight from barley canopies with varying levels of spot blotch, a foliar disease of barley. Spectrora-diometric measurements indicated that reflection of light in the .75 - .9 μm range was significantly less (P = < .01) from diseased canopies than from healthy ones. Yield of grain from the susceptible cultivar 'Larker' was correlated positively with amount of reflectance in the .75 - .9 μm range (P < .01). The results suggest the instrument may be useful for the objective assessment of foliar disease and the possible development of models to estimate losses from foliar disease.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vernyl D. Pederson and Forrest W. Nutter Jr. "Low-Cost,Portable Multispectral Radiometer For Assessment Of Onset And Severity Of Foliar Disease Of Barley", Proc. SPIE 0356, Field Measurement and Calibration Using Electro-Optical Equipment, (23 June 1983); https://doi.org/10.1117/12.934040
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