dry leaves of a young grape seedling. diseases of the vineyard

agriculture bordeaux brown caucasian check chlorosis cluster conditions contagious crop damage disease dry farmer fertilizer field fresh fungi fungicide fungus gardening grape harvest harvesting holding industry infection insecticid insects leaf leaves mildew mites mixture mold outdoors plant poor powdery quality sauvignon spore spores spray triangular vegetable vine vineyard viticulture whitened winegrower winery young