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Leaf Reflectance Spectra of Cereal Aphid-Damaged Wheat

^a USDA-ARS and Dep. of Agronomy, Lincoln, NE 68583 USA

View larger version (37K): [in a new window]   Fig. 1 Leaf dry weight (top) and area (bottom) of wheat subjected to control, greenbug, or Russian wheat aphid treatments. Values represent mean and standard deviation for four replicates per treatment

View larger version (46K): [in a new window]   Plate 1 Leaf reflectance spectra relative to a barium sulfate standard for plants damaged by greenbugs or Russian wheat aphids. Values represent mean and standard deviation for four replicates per treatment

View larger version (28K): [in a new window]   Fig. 2 Spectral sensitivity of leaf reflectance to greenbug or Russian wheat aphid feeding damage. Sensitivities were calculated by dividing the reflectance differences by the control leaf reflectance (zero sensitivity). Values represent means for four replicates per treatment