"Edward" wrote ...
http://www.dadooda.com/index.cfm/fa/...ibrary_ID/6046

See photo of problem above.

90% of my plum tomatoes have an internal problem - blackening - appear
to be going rotten. There is nothing wrong with the taste away from
the blackened area - other than there isn't much!!

There is no indication of any problem from the outside whatsoever -
they appear to be in perfect condition.

Ideas please.

Remembered something but not completely so looked it up ....
Are the top leaves wilting and turning yellow? Dry dark brown to black
patches on the stems?
If so it's Tomato Pith Necrosis caused by a bacterium, Pseudomonas
corrugata, spread by water splashes, hands and tools. Control is remove and
burn all affected plants, sterilise all tools, careful with the watering
don't splash the plants, clean hands.

I would also suggest a thorough sterilisation of the greenhouse and all
tools over winter to try to rid yourself of this disease for next season.

--
Regards
Bob Hobden
just W. of London