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With warm-season vegetables in peak production this time of year, inquiries about blossom end rot have been abundant. Prevalent in tomatoes but also found in peppers, squash, cucumber, eggplant ...
Calcium roots loss (blossom end rot) on a tomato. Calcium (Ca) deficiency is a plant disorder that can be caused by insufficient level of biologically available calcium in the growing medium, but is more frequently a product of low transpiration of the whole plant or more commonly the affected tissue.
Blossom-end rot is another sign of plant disease that may accompany blackheart in the same plant. A black rot originates opposite the stem area of the plant fruit (the "blossom-end"), and spreads over the fruit as a dark, hardened area. The causes of blossom-end rot and blackheart are the same. [citation needed]
Blossom end rot in tomatoes is often caused by a low concentration of calcium in the fruit. It can also occur in peppers and eggplant.
Calcium deficiency causes blossom end rot in tomatoes and some other plants, but inconsistent watering is often the real problem.
Charcoal rot Macrophomina phaseolina. Choanephora blight Choanephora cucurbitarum. Damping-off and root rot Rhizoctonia solani Phytophthora spp. Fusarium spp. Pythium spp. Downy mildew Peronospora tabacina. Fusarium stem rot Fusarium solani. Fusarium wilt Fusarium oxysporum f.sp. capsici. Gray leaf spot Stemphylium solani Stemphylium lycopersici
Calcium deficiency may arise in tissues that are fed by the phloem, causing blossom end rot in watermelons, peppers and tomatoes, empty peanut pods and bitter pits in apples. In enclosed tissues, calcium deficiency can cause celery black heart and "brown heart" in greens like escarole .
The first symptom of blossom-end rot is soft, wet, and reddish discolorations that appear in the late summer months. As the rot stops growing it will begin to dry out and appear sunken. [14] The affected fruit will often drop prematurely. Fungicide experiments have shown reduced incidence, from 5% to less than 0.5%, with treatment. [21]