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1 December 2007 Airborne Multi-Spectral Remote Sensing of Russian Wheat Aphid Injury to Wheat
Norman Elliott, Mustafa Mirik, Zhiming Yang, Tom Dvorak, Mahesh Rao, Jerry Michels, Thia Walker, Vasile Catana, Mpho Phoofolo, Kris Giles, Tom Royer
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Abstract

The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), is a severe pest of wheat in the High Plains region of the United States. Remote sensing may be an effective way to detect RWA infestations in fields for pest management decision-making purposes. We evaluated an airborne multi-spectral remote sensing system for its ability to differentiate varying levels of injury caused by RWA infestation in winter wheat fields. Two fields located in southeastern Colorado were studied in spring 2004 and two fields located in far western Oklahoma were studied in spring 2005. The proportion of wheat stems damaged by RWA in each field was measured in 20 to 24 3×3-m plots with varying levels of RWA infestation. Prior to sampling plots, multi-spectral imagery was obtained using an SSTCRIS® multi-spectral imaging system mounted NADIR in a Cessna 172 aircraft. The multi-spectral data were compared with the intensity of RWA damage to wheat plants within the plots. Correlations between vegetation indices calculated from the multi-spectral data with the proportion of RWA damaged wheat tillers per plot were negative for all vegetation indices. Regressions of vegetation indices versus the proportion of RWA damaged wheat tillers per plot were usually significant and had negative slopes. However, slopes and intercepts of regressions differed significantly among fields. Any one or a combination of differences in time of day, atmospheric conditions, edaphic factors (e.g. soil type and soil moisture), wheat variety, and possibly other factors could have caused the differences observed in regressions.

Norman Elliott, Mustafa Mirik, Zhiming Yang, Tom Dvorak, Mahesh Rao, Jerry Michels, Thia Walker, Vasile Catana, Mpho Phoofolo, Kris Giles, and Tom Royer "Airborne Multi-Spectral Remote Sensing of Russian Wheat Aphid Injury to Wheat," Southwestern Entomologist 32(4), 213-219, (1 December 2007). https://doi.org/10.3958/0147-1724-32.4.213
Published: 1 December 2007
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