vineyard one head of vine attacked by pests - leaves dry and damaged

agriculture aphid bacterial bad borers branch brown chlorosis damage destroyed disease infographic diseased downy mildew dying enologist farming fungal fungus gardening grape diseases leaves grapes grapevine greenfly infected infection microorganism mite natural parasite pest pesticides pests phylloxera plant problem pseudoperonospora sick spider symptoms unhealthy vine vineyard viniculture viticulture wine expert winery yellow one head attacked dry damaged damaged