On‐the‐go sensing of grape berry anthocyanins during commercial harvest: development and prospects |
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Authors: | R.G.V. BRAMLEY M. LE MOIGNE S. EVAIN J. OUZMAN L. FLORIN E.M. FADAILI C.J. HINZE Z.G. CEROVIC |
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Affiliation: | 1. CSIRO Ecosystem Sciences, Waite Campus, PMB 2 Glen Osmond, SA 5064, Australia;2. Force‐A, Université Paris Sud, Bat. 503, 91 893 Orsay, France;3. Taylors Wines, PO Box 90, Auburn, SA 5451, Australia;4. Laboratoire Ecologie Systématique et Evolution, CNRS, UMR 8079, Université Paris Sud, Bat. 362, 91 893 Orsay, France |
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Abstract: | Background and Aims: The development and adoption of Precision Viticulture approaches to grape and wine production have been hindered by the lack of a commercially available sensor for on‐the‐go sensing of fruit quality during harvest. In this work, we sought to deploy the Multiplex®, a fluorescence‐based non‐contact hand‐held optical sensor on a harvester, for on‐the‐go sensing of berry anthocyanins during the South Australian vintage of 2010. Methods and Results: Measurements made of anthocyanin concentrations in the laboratory using the Multiplex showed high correlation (R2 > 0.9) with those made on the same grapes using the standard spectrophotogrametric method. When used in hand‐held mode in the field, data collected using Multiplex demonstrated a similar spatial structure to that observed in other data layers (remotely sensed vigour, yield, elevation). Similarly, when deployed on a harvester as an on‐the‐go sensor, data obtained using Multiplex exhibited the expected spatial structure. Conclusions: Meaningful measurement of grape berry anthocyanins on‐the‐go during harvest is feasible using Multiplex. Significance of the Study: This is the first time that berry colour has been sensed on‐the‐go during harvest. The work therefore paves the way for a greater focus on attributes of fruit quality in the delineation of vineyard management zones and implementation of Precision Viticulture. |
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Keywords: | grape quality precision viticulture proximal sensing selective harvesting terroir Vitis vinifera |
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