The effect of reflective plastic foils on berry quality of Cabernet Sauvignon

The sunlight condition in vineyard is fundamental factor to grape quality through its effect on photosynthesis. The elements of berry quality, as content of dry matter, phenols and anthocyanins are directly under the influence of light intensity and its penetration into the fruiting zone. The trial was established in vineyard with cv. Cabernet Sauvignon to determine the effect of silver, white and red colour plastic foil on dynamic of dry matter after veraison, and content of both total phenols and total anthocyanins in berries in compare to cultivated soil. The influence of different coloured foils on PAR into fruiting zone was determined after veraison up to harvest. The results showed that reflective plastic foils enhanced the PAR into the fruiting zone, increased total dry matter, total phenols and anthocyanins in berries depending of foils colour.