 Many vineyards operate without the need for any chemical spraying, a condition conducive to organic viticulture.The periodic occurrence of the El Niño phenomenon can have a sharp influence on climate condition during a growing season-such as the case during the 1998 vintage when prolong heavy rains brought by El Niño led to widespread rot and fungal disease.The Andes Mountains are the dominant geographical feature of Argentine wine regions, with the snow-capped mountains often serving as a backdrop view to the vineyards.