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https://hdl.handle.net/1959.11/3518
Title: | Identification of yellow rust in wheat using in-situ spectral reflectance measurements and airborne hyperspectral imaging | Contributor(s): | Huang, Wenjiang (author); Lamb, David (author); Niu, Zheng (author); Zhang, Yongjiang (author); Liu, Liangyun (author); Wang, Jihua (author) | Publication Date: | 2007 | DOI: | 10.1007/s11119-007-9038-9 | Handle Link: | https://hdl.handle.net/1959.11/3518 | Abstract: | The aim of this study was to evaluate the accuracy of the spectro-optical, photochemical reflectance index (PRI) for quantifying the disease index (DI) of yellow rust ('Biotroph Puccinia striiformis') in wheat ('Triticum aestivum L.'), and its applicability in the detection of the disease using hyperspectral imagery. Over two successive seasons, canopy reflectance spectra and disease index (DI) were measured five times during the growth of wheat plants (3 varieties) infected with varying amounts of yellow rust. Airborne hyperspectral images of the field site were also acquired in the second season. The PRI exhibited a significant, negative, linear, relationship with DI in the first season (r² = 0.91, n = 64), which was insensitive to both variety and stage of crop development from Zadoks stage 3–9. Application of the PRI regression equation to measured spectral data in the second season yielded a coefficient of determination of r² = 0.97 (n = 80). Application of the same PRI regression equation to airborne hyperspectral imagery in the second season also yielded a coefficient of determination of DI of r² = 0.91 (n = 120). The results show clearly the potential of PRI for quantifying yellow rust levels in winter wheat, and as the basis for developing a proximal, or airborne/spaceborne imaging sensor of yellow rust in fields of winter wheat. | Publication Type: | Journal Article | Source of Publication: | Precision Agriculture, 8(4-5), p. 187-197 | Publisher: | Springer New York LLC | Place of Publication: | United States of America | ISSN: | 1573-1618 1385-2256 |
Fields of Research (FoR) 2008: | 070308 Crop and Pasture Protection (Pests, Diseases and Weeds) | Socio-Economic Objective (SEO) 2008: | 970103 Expanding Knowledge in the Chemical Sciences | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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