0
points
Infected tomato fruits

Tomato    ICRISAT, India

I have doubt about these pictures. Is this Bloosm end rot of Tomato?


Posted by: Chandramani Raj (1 point) Chandramani Raj
Posted: June 28, 2016


Mauro Vardasca commented,
Hi, in my prespective, they just need calcium. Try to find a fertilizer strong in calcium (CaO) and spray them once a week and you will see results on new fruits.
over 3 years ago.



Answers

1
point
No it is not blossom end rot. It looks like early blight of tomato caused by fungus Alternaria solani. The symptoms appear at stem-end (the lesions starts from the area of attachment between the calyx and the fruit). The spots are brown to black in color, firm, depressed and has distinct concentric rings.


Posted by: Dr. Ravishankar Narayana (8 points) Dr. Ravishankar Narayana
Posted: June 28, 2016


Chandramani Raj commented,
Thanks Dr Ravi. I found this symptom on large scale in Tomato field.
over 3 years ago.

Dr. Ravishankar Narayana commented,
Hi Raj, do you have pictures with symptoms on leaves? If yes please upload them in your question. Thanks
over 3 years ago.

Dr. Ravishankar Narayana commented,
Images you recently uploaded (image 1 and 2) looks like tomato sun scald.
over 3 years ago.

Chandramani Raj commented,
Yes, you are right Dr. Ravi..leaf symptoms indicates early blight of tomato.
over 3 years ago.



1
point
Target spot: Lesions of young fruit first appear as dark, sunken, pinpoint, brown spots. These lesions can be confused with symptoms of abiotic problems.

In my experience with tomato i can say this isnt problem of Alternaria solani.

i found this picture in my book of the American Phytopathological Society.


Posted by: Kevin (3 points) Kevin
Posted: June 28, 2016


Chandramani Raj commented,
Thanks Kevin. I have some more picture similar to target spot symptoms.
over 3 years ago.

Kevin commented,
Your welcome Chandramani Raj
over 3 years ago.



0
points
The first injury is "sunscald", after that, the injured tissue can be infected by several kind of fungi, mainly Alternaria solani (early blight) and sometimes Alternaria alternata (blackmold)
"Sunscald" is an abiotic disease caused by long exposure of the fruit to direct sunlight.


Posted by: Juan Tizcareño Iracheta (4 points) Juan Tizcareño Iracheta
Posted: February 5, 2017


Juan Tizcareño Iracheta commented,
Obviously this injury is on jalapeño chillies; but symptoms and signs are equals on tomatoes.
almost 3 years ago.



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