Tuber Magnatum - Italian White Truffle
The Italian white
truffle (Tuber magnatum) is found primarily below 600 meters ASL in
Northern Italy and up to 900 meters ASL in Central Italy. It is also
found in small areas of south-eastern France, in Istria, Croatia, and
the Ticino district of Switzerland.
The mean January temperatures
in these areas range from -2 to 8°C and mean July temperatures from 18
to 26°C. The mean annual precipitation varies from 500 to 2000 mm, which
is spread more or less evenly throughout the year. Though in summer,
this rain is usually as thunderstorms.
In Italy, this truffle is
found in woods with more or less closed canopies, also in areas with
relatively sparse vegetation along stream beds. Host trees include the
hazelnut (Corylus avellana), willows (Salix spp.), hop hornbeam (Ostrya
carpinifolia), Italian alder (Alnus cordata), poplars and aspens
(Populus spp.) and oaks (Quercus spp.). The most productive hosts are
poplars and willows.
The Italian truffle is harvested from mid
August until the end of December. In August and early September, the
fruiting truffles are usually severely infested by insect larvae such as
Suillia univittata.
Unlike the black truffle, the Italian truffle
is used either uncooked or added to dishes after cooking. The white
truffle is used as flavouring for salads or pasta, to retain its
delicate and volatile aroma. As the black truffle is usually used in
cooked dishes and is harvested between November and March, there is
little competition in the marketplace between the two types of truffles.
Tuber
magnatum (Italian white truffle) is the most expensive of the truffles.
It is considered to be the queen of all truffles while the black
truffle is considered king in gastronomic circles.
Large Italian
white truffles in excess of 250 gr. and up to 2 kg. usually demand a
relatively higher price. The harvesters receive about 60% of the
wholesale price. In Italy, to avoid paying taxes on the truffle sales
(paid by the seller), as much as half of the crop is sold on the black
market.
The Italian white truffle has not yet been cultivated (
artificially inoculated ) on to any host tree yet. So supplies are
limited to what can be harvested from natural areas. Even thou in the
year 2010, there where reports saying that some scientists were close to
successfully inoculating host trees with the Italian white truffle
spore or mycelium. So lets hope that this mystery can be finally solved
and plant more Italian truffle trees.
Italian white truffles are
commercially canned and bottled but the aroma changes in this process.
When the truffle is preserved, they are quite inferior to the fresh
truffle. Cans and bottles of Italian white truffle may also contain
other morphologically similar species such as Tuber dryophilum, Tuber
borchii (bianchetto) or Tuber maculatum. Italian white truffle oil is
widely sold in upscale delicatessens. Sadly, most of these truffle
flavoured olive oils have never seen a truffle. The truffle aroma is
usually being derived from added chemicals. Despite the high demand and
the high prices prices, the production of the Italian white truffle,
like the black truffle, has declined over the past 100 years.
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