RS-9
ActiveVitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
10 August 2026
The variety is autochthonous to France, presumably from Burgundy. It is genetically related to Duras and Petit Verdot. It has color mutations: white Tressot blanc and variegated Tressot panaché. The variety is often mistakenly confused with the Trousseau variety.
The plant is of medium vigor, requiring long pruning and trellis training. The leaf is pentagonal, five-lobed, deeply dissected, with arachnoid pubescence on the underside. The flower is hermaphroditic. The bunches are cylindro-conical, often winged, and compact. The berries are small, round, with thin skin.
The variety is not resistant to frost, downy mildew, and is particularly susceptible to powdery mildew. Poor affinity with rootstocks is noted. It is intended exclusively for winemaking, producing tannic and alcoholic wines with high acidity.
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ Tressot N*FR
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Same species
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
David W.Cain
Vitis L. · Grapevine
Vitis L. · Grapevine
Vitis L. · Grapevine
Nearby in the species list Trebbiano Romagnolo B., Trebbiano Spoletino B., Trebbiano Toscano, Trebbiano toscano B., Trebbianolli, Trebbianone, Treixadura, Trepadell, Trepat, Trepat Blanc, Trevisana nera N., Trigueira R, Trilla, Trilla K.M.1, Trincadeira Branca B, Trincadeira das Pratas B, Trincadeira Preta, Trincadeira T, Trišljavac, Trišnjavica