Diseases

Blossom-end rot

Blossom-end rot is a physiological metabolic disorder caused by a local calcium deficiency in fruit tissues. It manifests as sunken dark spots at the blossom end of the fruit under conditions of water or temperature stress.

Mentioned in descriptions 922 varieties reference book.

Blossom-end rot is a non-infectious physiological disorder caused by impaired calcium transport to the fruits. A watery spot forms at the apex of the developing fruit, which eventually darkens, becomes sunken, and turns dark brown or black with a dry surface.

The development of the disease depends on environmental conditions, including water and temperature stress, as well as nutrient imbalances in the soil. Risk factors include sudden fluctuations in moisture, high air temperatures, excessive nitrogen or calcium antagonist levels, and increased soil acidity.

Genetic resistance of a variety is determined by the plant's ability to effectively distribute calcium and the structural stability of the fruit cell walls. Varieties with elongated fruit shapes, large-fruited types, and pink-fruited forms are the most susceptible to the pathology due to anatomical features and thinner skin.

Resistance assessment in variety trials is conducted through phytopathological monitoring, taking into account the percentage of affected plants and the intensity of necrosis. To differentiate genetic resistance from the influence of agrotechnical factors, trials require standardized growing conditions.

Sources10

Breakdown by crop

Blossom-end rot of tomato 208 Blossom End Rot of Pepper 107 Blossom-end rot of tomato 8 Blossom-end rot of eggplant 5

Found in these crops

Tomato 160 Bell pepper 78 Tomato 6 Eggplant 5 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 2 Field pumpkin 1 Watermelon 1 Leek 1

Varieties that feature this in their description

Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.

Dunistar

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

7 records

Active

Capsicum annuum L. · Bell pepper

SABANCI METIN

NL UA

5 records

Silverstone

Active

Capsicum annuum L. · Bell pepper

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

6 records

Romboni

Active

Capsicum annuum L. · Bell pepper

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.