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agronom.cc cultivar database

Variety traits

Shattering of grapes

Vitis vinifera L.

A trait characterizing the shedding of flowers, ovaries, or mature grape berries, which determines the final yield and marketability of the cluster.

In the reference 104 varieties crop Common grape vine, where this is mentioned in the description.

The assessment of shattering is a mandatory element of the ampelographic description of a cultivar. The methodology consists of using isolators on 20–30 inflorescences before the onset of flowering, followed by counting the fallen elements and the total number of berries at harvest. The trait is expressed as the percentage ratio of fallen parts to the total number of ovaries.

For most cultivars, natural shattering is considered the biological norm, where the degree of shattering is 47–60% and does not hinder the formation of a full-grown cluster. Excessive shattering leads to the exposure of the rachis and a sharp decline in productivity, requiring the application of specific agrotechnical measures, such as pinching or girdling of shoots.

In addition to the ovary, shattering can manifest as the dropping of already mature berries due to a disruption in the connection with the pedicel. This process is often associated with a physiological disorder known as rachis paralysis, which occurs as a result of imbalances in water and mineral metabolism, making shattering an indicator of unfavorable growing conditions.

General information about the subject — on the page Shattering.

Sources8

Varieties of Common grape vine mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

IFG Eleven

Active

Vitis vinifera L. · Common grape vine

David W. Cain, PhD.

8 records

Sugraeighteen

Active

Vitis vinifera L. · Common grape vine

Sun World International, Inc (US)

FR IT
6 records

Princess

Active

Vitis vinifera L. · Common grape vine

The United States of America as represented by the Secretary of Agriculture

4 records

Malbec

Active

Vitis vinifera L. · Common grape vine

ES FR MT
6 records

King Husainy

Active

Vitis vinifera L. · Common grape vine

Mordechai Karniel, Deceased

IT
3 records

Carmenère

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

FR MT
4 records

Glera

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

FR
3 records

Auxerrois

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

DE FR
2 records

Carillon

Active

Vitis vinifera L. · Common grape vine

Staatliches Weinbauinstitut Freiburg

DE
2 records

Sublima Seedless

Active

Vitis vinifera L. · Common grape vine

GARGIULO ANGELO

IT MT
2 records

Aromera

Active

Vitis vinifera L. · Common grape vine

InnoVitis GmbH

DE
2 records

Aledo

Active

Vitis vinifera L. · Common grape vine

ES FR
3 records

Misket kaylashki

Active

Vitis vinifera L. · Common grape vine

Vasil Valchev, Georgi Petkov, Yordan Ivanov

BG
1 record

Danuta

Active

Vitis vinifera L. · Common grape vine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR
2 records

Tourbat

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

FR
1 record

Carla

Active

Vitis vinifera L. · Common grape vine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR
2 records

Pamid clon 5 76

Active

Vitis vinifera L. · Common grape vine

Z. Nakov, V. Valchev, M. Ivanov, V. Tsvetkov, V. Haygarov, T. Yoncheva

BG
1 record

Ortega

Active

Vitis vinifera L. · Common grape vine

LAND BAYERN WUERZBURG| Land Bayern, vertreten durch Bayerische Landesanstalt fuer Weinbau und Gartenbau - Abt. Weinbau und Oenologie -

DE
2 records