Low-Cost,Portable Multispectral Radiometer For Assessment Of Onset And Severity Of Foliar Disease Of Barley

Vernyl D. Pederson; Forrest W. Nutter Jr.

doi:10.1117/12.934040

23 June 1983 Low-Cost,Portable Multispectral Radiometer For Assessment Of Onset And Severity Of Foliar Disease Of Barley

Vernyl D. Pederson, Forrest W. Nutter Jr.

Author Affiliations +

Proceedings Volume 0356, Field Measurement and Calibration Using Electro-Optical Equipment; (1983) https://doi.org/10.1117/12.934040
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

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.

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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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