Reducing possibly synthetic fungicide input by using vigor thresholded NDVI as early risk indicator of <i>Botrytis</i> bunch rot in vineyards

Botrytis bunch rot (BBR) is a major disease occurring in vineyards worldwide. Its control, still largely based on synthetic fungicide sprayings at pre-determined intervals, often leads to residues in grapes and wines that may negatively affect the environment and/or human health. To rationalise BBR management, early disease risk indicators were developed and evaluated in field experiments carried out between 2010 and 2019 in both France and Chile.