Small berry

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Term for the insufficient development or physiological disorder of the grapevine, which manifests itself through uneven size and insufficient ripening of the berries. As a rule, the proportion of flowers that develop into berries is only 30 to 60%, depending on the grape variety (flowering rate), the vine could not bring all fruits to full ripeness. This is a manifestation of the coulure, i.e. fertilisation disorder. The most common cause is cold, rainy or otherwise bad weather in the flowering phase of the annual vegetative cycle. Other factors such as nutrient deficiency, especially boron, may also play a role. Usually, there are many small, green and hard berries (shot berries) that remain unripe. However, the berries can also ripen later with a high sugar but low acid content. Certain grape varieties, clones or rootstocks are particularly susceptible due to genetic disposition. These include Cabernet Sauvignon, Cot, Gewürztraminer, Muskat-Ottonel, Ortega, Sangiovese, Zinfandel and Zweigelt.

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Small berry

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