Of Climbing Vines and Copper Crystals

risoprinted book





Some 150 years ago, in an attempt to deter thieves from nicking grapes, farmers sprayed their vines with a mixture of lime, copper sulfate and water. It deterred more than the local thieves: the otherwise invincible-seeming pest downy mildew withdrew as well. These days, the many, many millions of grapevines that are spread out over vast hills all across the world depend on tiny blue copper sulfate crystals. And so do our wine drinking habits. But the crystals have a life of their own. Fighting thieves and pests comes with a price: copper accumulates in the soil, disturbing rhizobium, earthworms and soil fungi. How to compose a world with wine, worms and these bright blue crystals?

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