By Newdawn
Kerry ,
Ireland 
These are my tomato plants. Do they need to be sprayed with something and is it any danger to the other plants in the greenhouse.
15 Jul, 2017
Answers
Ok. Thank you.
15 Jul, 2017
What are you feeding your tomato plants with?
15 Jul, 2017
Yes, it looks more like a nutrient deficiency than a disease, to me.
16 Jul, 2017
To me it looks more like verticillium fungus infection. This results from growing tomatoes in the same location. Adding a layer of mulch could help control it for a little while anyway.
16 Jul, 2017
How well aired is your green house? When we grew tomatoes we always kept the door and the vents open.
16 Jul, 2017
Thank you all for replying. I bought them about 4-6 weeks ago. They were in 1lt pots. I put them into 10lt pots. I feed them with tomato feed and they are well ventilated, I'm at a loss as to what is going on.
16 Jul, 2017
Over potted to start with possibly.
16 Jul, 2017
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Cut off those affected leaves before it spreads to the rest of the plant.
15 Jul, 2017