If it's a blight - let's call it fungal - issue, it has no devastating impact on the soil. If Late Blight, the spores don't live on in soil. If Early Blight, much more common, spores can have fallen to the soil. Turn the soil over and bury them. Buried, they're harmless. Ditto the other fungal diseases. A scrub of the greenhouse with a 1:10 bleach solution will deal with any lingering nasties.
Given reasonable precautions, reinfection from spores from the previous season is pretty rare. Most infections are new ones. Fresh spores arrive every season. They travel on the breeze. There's really no avoiding them.
This looks very much like blight to me, don't forget we've just had the wettest summer ever which favours blight spread. Unusual though that there are no lesions on the foilage. Best to remove infected fruit and ' infected 'whole' branches and hope for the rest to ripen. Too much humidity in glass house will favour spread of spores but it has been so wet with very early dews and dusk dews. Mine in soil in the garden have a few infected plants - those in pots on a South facing wall seem to be OK, better pollination and fruit set - a long time to ripen though - may be the year for Tom Chutney????
Leaves infected with Late Blight develop water-soaked patches that turn brown. In humid weather there may be a white, downy growth on spots. Over time the spots expand rapidly and become brown to purplish- black as tissue dies. Plant may look “frosted”.
Fruits can be affected at any stage. Large irregular, rough, brown-green lesions can be found on the fruit. The disease (which is devastating in potatoes) can also cause severe losses in tomatoes when conditions are favourable (cool, wet weather) resulting in severe defoliation.
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If it's a blight - let's call it fungal - issue, it has no devastating impact on the soil. If Late Blight, the spores don't live on in soil. If Early Blight, much more common, spores can have fallen to the soil. Turn the soil over and bury them. Buried, they're harmless. Ditto the other fungal diseases. A scrub of the greenhouse with a 1:10 bleach solution will deal with any lingering nasties.
Given reasonable precautions, reinfection from spores from the previous season is pretty rare. Most infections are new ones. Fresh spores arrive every season. They travel on the breeze. There's really no avoiding them.
This looks very much like blight to me, don't forget we've just had the wettest summer ever which favours blight spread. Unusual though that there are no lesions on the foilage. Best to remove infected fruit and ' infected 'whole' branches and hope for the rest to ripen. Too much humidity in glass house will favour spread of spores but it has been so wet with very early dews and dusk dews. Mine in soil in the garden have a few infected plants - those in pots on a South facing wall seem to be OK, better pollination and fruit set - a long time to ripen though - may be the year for Tom Chutney????
I agree with the above. Looks like Late Blight.
Leaves infected with Late Blight develop water-soaked patches that turn brown. In humid weather there may be a white, downy growth on spots. Over time the spots expand rapidly and become brown to purplish- black as tissue dies. Plant may look “frosted”.
Fruits can be affected at any stage. Large irregular, rough, brown-green lesions can be found on the fruit. The disease (which is devastating
in potatoes) can also cause severe losses in tomatoes when conditions are favourable (cool, wet weather) resulting in severe defoliation.
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