Is this blossom end rot?

[deltzy]

Black marks are forming on 'some' on my san morzano tomatoes, do you think its BER? If so what should I do about it. Many Thanks!

[img]https://i145.photobucket.com/albums/r202/gurbakash/DSC_0307.jpg[/img]

[img]https://i145.photobucket.com/albums/r202/gurbakash/DSC_0306.jpg[/img]

[img]https://i145.photobucket.com/albums/r202/gurbakash/DSC_0308.jpg[/img]

[img]https://i145.photobucket.com/albums/r202/gurbakash/DSC_0305.jpg[/img][/img]

[engineeredgarden]

Yep, that's BER, and paste tomatoes are the worst at getting it..

EG

[hardland]

Had a similar problem. I noticed it was worse on the first few fruit that formed and I treated with Blossom end rot spray. A calcium spray.