The short answer is that I don't know. BUT
I have been growing tomatoes for 30 years, (Cheshire and Devon) preferred
variety Ailsa Craig with Sugarplum. This year It's those two with an Italian
befstake tomato.
I have grown other varieties except Moneymaker (prejudice on my part) and
have come to the conclusion that flavour seems to depend on growing
conditions -better in natural soil-and ensuring that the tomato ripens on
the plant.
Greenback can be avoided with Ailsa Craig by using more potash than is
normally included in commercial tomato foods.
I have found that Ailsa Craig ripening outdoors can have quite tough skins,
and in occasionally in past years the earlier ripening tomatoes had tougher
skins.
Tomatoes are sensitive to atmospheric humidity-pollination is a problem in
the dry. Humidity in the UK on average relates to the surrounding sea
temperatures and doesn't really start to get up until the end of July.
Humidity is also lower on the east side of Britain. It may be that hot days,
which will drop the humidity in the greenhouse and cool nights are a
problem.
Trying to be helpful!
Regards
"Alan Gould" wrote in message
...
In article , vsop
writes
However, I would very much appreciate more info on the subject of "nettle
infusion" as a means of controlling white fly on greenhouse
toms.........recipe, rates of application etc. Does it harm the fruit if
sprayed on them? Do you also use it as a root applied fertiliser in the
normal way ?

The urg nettle infusion FAQ is at:
http://www.nugget.demon.co.uk/MetaFAQ/nettle.html
have a look at that, then I'll fill in any further details you need.
Best wishes.
--
Alan & Joan Gould - North Lincs.