University of Florida

Blossom End Rot

Cause

Deficient or unavailable calcium.

Affects

Fruit.

Symptoms

Light green to brown areas develop on the blossom end of fruit, affected areas shrink and develop a dry rot with a characteristic brown to black external color due to the secondary invasion of fungi.

Favorable Conditions

Poorly limed sandy soils, extreme dry or wet weather during fruit development, excessive amounts of nitrogenous fertilizer especially ammoniacal nitrogen, or total fertilizer salts during periods of variable soil moisture.

Blossom End Rot Picture

blossom end rot
Image # 141
Blossom end rot-
typically dark, shriveled lesion always including the blossom end of fruit.