Blight on tomato plants [greenhouse]

[goosander]

Was wondering what is causing tomato blight in my greenhouse.
I give a number of my neighbours as well as the local hospice plants about 150-200 plants in total and I am the only one that has any bother with them.
Any help would be greatly appreciated
Bob.

[maverick451]

Getting more airflow in the greenhouse helps me, I leave the door open day and night in summer.

[happyhumph]

Yes, good airflow & watering at the base avoiding foliage getting wet. Also, don't compost affected plants - get rid or destroy them.

[Nicos]

Do you water from collected rainwater?
I have heard that the spores can be picked up in raindrops.
Just a thought as I am no expert as far as tomatoes are concerned.

[Jungle Jane]

Is it definitely blight & not magnesium deficiency? If it is blight,I wouldn't reuse that compost for tomatoes next year,plant something else in it,some spores can survive in the compost. Some weeds & other nightshades can be a host plant for blight too. Try not to get any of the leaves wet when watering,they're a big invitation for fungi & bacteria.

[Thelma Sanders]

Is it Blight or is it Botrytis? I think it is much easier to get the latter, through high humidity and lack of airflow. I think real blight is quite rare in greenhouses.
Can you please post some pictures, including some closeups.

[goosander]

Thank you for your help. Will try and post some pictures. Cut off most and threw out the rest.
Bob