Abstract
Site-specific application of herbicides offers a lot of potential for reducing the use of synthetic pesticides in agriculture. For corn, it has been estimated that pesticide savings in the order of 50% could be feasible. One of the main limitations for the adoption of precision herbicide application is the availability of quick and economical means of identifying weed patches requiring treatment. Fluorescence spectroscopy is being investigated as a tool for real-time weed-crop discrimination. A preliminary study was conducted on greenhouse grown corn and associated weeds. Fluorescence of young plants was induced with UV light and spectra in the 400-760 nm range were recorded. A database of 1410 spectral signatures was assembled where 12 plant species are represented at three growth stages. Preliminary analysis of the data showed that fluorescence spectroscopy could be an efficient tool for weed-crop discrimination. The main challenge resides in the discrimination between monocotyledon weeds and corn.
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