Mapping vineyard vigor using airborne remote sensing: relations with yield, berry composition and sanitary status under humid climate conditions

Ferrer, Milka; Echeverría, G.; Pereyra, Gustavo; González-Neves, Gustavo; Pan, Dinorah; Mirás-Avalos, José Manuel

doi:10.1007/s11119-019-09663-9

Cited by 41 publications

(48 citation statements)

References 41 publications

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“…The analysis of Pearson's correlation coefficients between environmental and spectral features (Analysis 1) provided a general framework to identify the spectral bands/VIs more sensitive to the changes in environmental conditions during the heatwaves. The positive correlations of GDD with NDVI and SAVI were not considered valuable information on the heatwaves, and it is likely that the higher values of the VIs at increasing GDDs was caused by a natural intensification of vigor over the growing season [20,[79][80][81].…”

Section: Discussionmentioning

confidence: 99%

Assessing the Feasibility of Using Sentinel-2 Imagery to Quantify the Impact of Heatwaves on Irrigated Vineyards

et al. 2019

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Heatwaves are common in many viticultural regions of Australia. We evaluated the potential of satellite-based remote sensing to detect the effects of high temperatures on grapevines in a South Australian vineyard over the 2016–2017 and 2017–2018 seasons. The study involved: (i) comparing the normalized difference vegetation index (NDVI) from medium- and high-resolution satellite images; (ii) determining correlations between environmental conditions and vegetation indices (Vis); and (iii) identifying VIs that best indicate heatwave effects. Pearson’s correlation and Bland–Altman testing showed a significant agreement between the NDVI of high- and medium-resolution imagery (R = 0.74, estimated difference −0.093). The band and the VI most sensitive to changes in environmental conditions were 705 nm and enhanced vegetation index (EVI), both of which correlated with relative humidity (R = 0.65 and R = 0.62, respectively). Conversely, SWIR (short wave infrared, 1610 nm) exhibited a negative correlation with growing degree days (R = −0.64). The analysis of heat stress showed that green and red edge bands—the chlorophyll absorption ratio index (CARI) and transformed chlorophyll absorption ratio index (TCARI)—were negatively correlated with thermal environmental parameters such as air and soil temperature and growing degree days (GDDs). The red and red edge bands—the soil-adjusted vegetation index (SAVI) and CARI2—were correlated with relative humidity. To the best of our knowledge, this is the first study demonstrating the effectiveness of using medium-resolution imagery for the detection of heat stress on grapevines in irrigated vineyards.

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Section: Discussionmentioning

confidence: 99%

Assessing the Feasibility of Using Sentinel-2 Imagery to Quantify the Impact of Heatwaves on Irrigated Vineyards

et al. 2019

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“…One direct use of NDVI and SAVI is to characterize canopy growth and tree vigor [48,71,72], and so these indexes can be good estimators of pruning needs. However, it is well known that the lack of correlation between NDVI and vegetative growth could be due to soil water distribution and soil surface anisotropy, as well as the angular geometry of illumination at the time of the measurements [73].…”

Section: Role Of Ndvi Savi and Tc-ta Indexesmentioning

confidence: 99%

Terrestrial and Remote Indexes to Assess Moderate Deficit Irrigation in Early-Maturing Nectarine Trees

et al. 2019

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Monitoring plant water status is relevant for the sustainable management ofirrigation under water deficit conditions. Two treatments were applied to an early-maturingnectarine orchard: control (well irrigated) and precise deficit irrigation (PDI, based on soilwater content thresholds). Moderate water deficits generated by PDI were assessed bycomparing terrestrial: stem water potential (Ψstem) and gas exchange parameters, with remote:canopy temperature, normalized difference vegetation (NDVI), and soil adjusted vegetationindex (SAVI), plant water status indicators. The Ψstem was the only indicator that showedsignificant differences between treatments. NDVI and SAVI at the postharvest period wereappropriate indexes for estimating winter pruning, although they did not serve well as plantstress indicator. Vapor pressure deficit along with Ψstem values were able to predict remotesensing data. Ψstem and canopy to air temperature difference values registered the highestsignal intensity and NDVI the highest sensitivity for detecting water deficit situations. Theresults suggest that care should be taken when using instantaneous remote indicators toevaluate moderate water deficits in deciduous fruit trees; more severe/longer water stressconditions are probably needed. The proposed PDI strategy promoted water saving whilemaintaining yield, and could be considered a promising tool for semi-arid agrosystems.

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“…Furthermore, the use of NDVI may have many applications, for example, used as a proxy for tree biophysical features (van Dijke et al, 2019) or for studying cultivated plant biomass and the nitrogen status (Cao et al, 2013;Yao et al, 2014;Zhang et al, 2017). In viticulture, it has been also used near harvest for predicting yield (Sun et al, 2017;Di Gennaro et al, 2019) and characte-rizing the mature grape composition (Ferrer et al, 2019). The veraison stage has been proposed as the best phenological stage to measure and correlate the NDVI value with harvest yield and/or grape composition (Sun et al, 2017;Di Gennaro et al, 2019;Ferrer et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…In viticulture, it has been also used near harvest for predicting yield (Sun et al, 2017;Di Gennaro et al, 2019) and characte-rizing the mature grape composition (Ferrer et al, 2019). The veraison stage has been proposed as the best phenological stage to measure and correlate the NDVI value with harvest yield and/or grape composition (Sun et al, 2017;Di Gennaro et al, 2019;Ferrer et al, 2019). However, under Mediterranean conditions the spatial NDVI pattern (airborne image) acquired at 15 to 20 days before veraison showed a significant correlation with an image acquired at harvest (Kazmierski et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Vigor thresholded NDVI is a key early risk indicator of Botrytis bunch rot in vineyards

et al. 2020

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Botrytis bunch rot (BBR) is a major disease occurring in vineyards worldwide. Its control is still largely based on the use of synthetic fungicide sprayings at predetermined intervals, which often produces negative residues in grapes and wines that may affect the environment and/or human health. To rationalize BBR management, disease risk indicators were developed and evaluated in a set of field experiments carried out between 2010 and 2019 in France and Chile. Key indicators include early grapevine vegetative growth, i.e. ground-based normalized difference vegetation index (NDVI), and the potential berry susceptibility to Botrytis cinerea, which is driven by tannin content in the skin. Under these contrasting weather and cropping conditions, regression analyses, including weather information, showed a highly significant positive correlation between the early NDVI, measured at berry pea size stage, and BBR incidence or severity at harvest, whereas the opposite was demonstrated for tannin content in the berry skin measured at an early herbaceous fruit stage. The exponential relationship between the final disease severity and the early NDVI allowed us to identify a possible threshold NDVI value, i.e. between 0.5 and 0.6, under which the BBR severity should be lower or close to 5% at harvest (BBR tolerance threshold for wine quality).

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Mapping vineyard vigor using airborne remote sensing: relations with yield, berry composition and sanitary status under humid climate conditions

Cited by 41 publications

References 41 publications

Assessing the Feasibility of Using Sentinel-2 Imagery to Quantify the Impact of Heatwaves on Irrigated Vineyards

Assessing the Feasibility of Using Sentinel-2 Imagery to Quantify the Impact of Heatwaves on Irrigated Vineyards

Terrestrial and Remote Indexes to Assess Moderate Deficit Irrigation in Early-Maturing Nectarine Trees

Vigor thresholded NDVI is a key early risk indicator of Botrytis bunch rot in vineyards

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