Between the vine and the liquor store, plenty of secrets are submerged in your favorite bottle of wine. Here, Tilar J. Mazzeo, author of Back Lane Wineries of Sonoma, spills some of the best. Here are a few things you might not know about wine.
1. Digital eyes are everywhere in today's vineyards.
Certain premium estates in Bordeaux and Napa are beginning to look a little more like army bases—or an Amazon.com warehouse. They’re using drones, optical scanners, and heat-sensing satellites to keep a digital eye on things. Some airborne drones collect data that helps winemakers decide on the optimal time to harvest and evaluate where they can use less fertilizer. Others rove through the vineyard rows, where they may soon be able to take over pruning. Of course, these are major investments.
2. Modern vineyards also bury a lot of cow skulls.
They’re not everywhere, but biodynamic farming techniques are on the rise among vintners who don’t want to rely on chemicals, and this is one trick they’ve been known to use to combat plant diseases and improve soil PH. It’s called Preparation No. 505, and it involves taking a cow’s skull (or a sheep’s or a goat’s), stuffing it with finely ground oak chips, and burying it in a wet spot for a season or two before adding it to the vineyard compost.
3. Ferocious foliage is a vintner's secret weapon.
The mustard flowers blooming between vineyard rows aren’t just for romance. Glucosinolates in plants like radishes and mustard give them their spicy bite, and through the wonders of organic chemistry, those glucosinolates also double as powerful pesticides. Winemakers use them to combat nematodes—tiny worms that can destroy grape crops.
4. Roses in a vineyard are the wine country equivalent to the canary in the coal mine.
Vintners plant roses among their vines because the flowers get sick before anything else in the field. If there’s mildew in the air, it will infect the roses first and give a winemaker a heads-up that it’s time to spray.
5. Birds of prey help protect the grapes.
Small birds like blackbirds and starlings can clear out 20 percent of a crop in no time. But you know what eats little birds? Big birds. Falconry programs are on the rise in vineyards from California to New Zealand. Researchers have found that raptors eat a bird or two a day (along with a proportion of field mice and other critters) and cost only about as much to maintain as your average house cat.
6. Small bugs become big problems in wine tasting rooms.
Winemakers are constantly seeking ways to manage the swarms of Drosophila melanogaster that routinely gather around the dump buckets in their swanky showrooms. You know these pests as fruit flies, and some vintners in California are exploring ways to use carnivorous plants to tackle the problem without pesticides. Butterworts, sundews, and pitcher plants all have sweet-sounding names, but the bug-eating predators are fruit fly assassins, and you’ll see them decorating tasting rooms across wine country.
7. Wine needs to be filtered.
Winemaking produces hard-to-remove sediments. Filters can catch most of the debris, but winemakers must add “fining agents” to remove any suspended solids that sneak by. (Unwanted compounds in the wine bind with the fining agents so they can be filtered and removed.) Until it was banned in the 1990s, many European vintners used powdered ox blood to clean their wines. Today, they use diatomaceous earth (the fossilized remains of hard-shelled algae), Isinglass (a collagen made from fish swim bladders), and sometimes bentonite (volcanic clay). Irish moss and egg whites are also fine wine cleaners.
8. Wine is ever so slightly radioactive (that's a good thing).
About 5 percent of the premium wine sold for cellaring doesn’t contain what the label promises. So how do top-shelf buyers avoid plunking down serious cash on a bottle of something bunk? Most elite wine brokerages, auction houses, and collectors use atomic dating to detect fraud. By measuring trace radioactive carbon in the wine, most bottles can be dated to within a year or two of the vintage.
9. MRIs can determine the fine from the funk.
Even with atomic dating, there are certain perils involved in buying a $20,000 bottle of wine. Leaving a case in the hot trunk of your car is enough to ruin it, so imagine what can happen over a couple of decades if a wine isn’t kept in the proper conditions. Back in 2002, a chemistry professor at University of California at Davis patented a technique that uses MRI technology to diagnose the condition of vintage wines. This technique may soon be used at airport security, meaning you’ll be able to carry on your booze.
10. Wines can be aged instantly.
If you end up with a bottle of plonk, Chinese scientists have developed a handy solution. Zapping a young wine with electricity makes it taste like something you’ve cellar aged. Scientists aren’t quite sure how it happens yet, but it seems that running your wine for precisely three minutes through an electric field changes the esters, proteins, and aldehydes and can “age” a wine instantly.