Tomato diagosis - grey spots (?mould) on leaves.

[ddiogyn]

Does anybody know what this is? It's on an armpit, so i don't care too much about losing it, however, i'm worried for my main tomato crop - will it spread, any measures i can take to stop spread? It looks fungal...




Thanks

[Tomatoking]

The second picture on this link is grey mould, which looks like your second picture. Make sure you remove all the affected leaves and a fungal spray will stop it spreading.
However, my early blight did look a little like that last year. It might be better to spray your plants with a Bordeaux mix just in case. It is the only spray I have found that controls blight and stops it spreading, nothing will kill it.

Symptoms of gray mold on tomato leaves

Mr TK

[ddiogyn]

Thanks TK.

As the affected plant is a spare, i'm going to destroy rather than treat it. Can i re-use its container for another tomato plant (after giving it a good soak in some Dettol)?

Should spray all my other tomatoes with bordeaux mix as a precaution, or should i wait until signs of possible infection appear?

[rustylady]

Sounds more like botrytis to me. Found this link for you http://apps.rhs.org.uk/advicesearch/...e.aspx?pid=165 I would cut off the affected bits and improve the ventilation.

[Tomatoking]

Botrytis is similar and will get a lot of grey spores, treat the same really, like Rustylady has said good ventilation is really important at this time of the year. Also around bunches with quite large fruit, remove a few leaves to aid ventilation.

[ddiogyn]

Is it ok if the growing tomatoes come into contact with the bordeaux mix? I'm spraying all my plants (even though they show no signs of disease) - is this an unnecessary precaution?

[rustylady]

I personally don't like using chemicals, and if the problem can be cured or prevented by cultural means then I prefer to use them. Pick off all infected leaves and fruit, and ventilate the greenhouse.

[Tomatoking]

Is it ok if the growing tomatoes come into contact with the bordeaux mix? I'm spraying all my plants (even though they show no signs of disease) - is this an unnecessary precaution?

Yes it just says on the packet do not pick for a certain time.

I do understand people do not like using chemicals, but blight will wipe out a crop in no time, but each to their own.

It might not be blight, but botrytis always has lots of grey spores. maybe leave it and see for a few days. But one spray of bordeaux mix will do no harm, it will also help prevent the spread of botrytis and grey mould.

It is also is approved for organic use and so is often used by organic gardeners where non-organic gardeners would prefer other controls.