Spots on tomato leaves

[sarahkeast]

I am in the middle of tying up my tomatoes in the greenhouse. Just noticed some have redish brown spots on the leaves. Someone tell me it isnt blight. Please. Never had it so dont know [only 3rd year growing]

Going ot give them a good feed of stinky nettle juice after I have finished and then cross my fingers.

And too much of a techno moron to post pics...

[chickenchargrill]

Somebody feel free to correct me, but blight has a lighter ring around it. If it's just brown spots it's probably septoria, not too much of a problem and won't affect the toms. Just trim off the infected leaves then disinfect your pruning gear.

[Arwel]

If it is blight you want to destroy it asap before it spreads to your spuds if you have any. I found blight on some spuds i'm growing separately from my main crop today. Harvested the spuds and then annihilated the remaining plant bits with some petrol ..Fingers crossed as i planted a ridiculous amount of spuds this year and i'd hate to seem them all get nailed by blight

[MKG]

If I had to bet, I'd say Septoria too. Have you, by any chance, been splashing the leaves when you watered the plants?

Mike

[Odsox]

Have you, by any chance, been splashing the leaves when you watered the plants?

I'll tell you about an interesting discovery Mike .. well I think it's interesting anyway.

I made a similar remark on this forum a couple of years ago about leaf burns due to water droplets and a forum member who has long since left us commented that it was rubbish, doesn't happen, an old wives tale.
So taking up the challenge, on a very sunny midsummer day I placed a nicely convex water droplet on a tomato leaf in the greenhouse in full sun ..... and guess what, he was right.
Not a scorch mark, not even a slight discolouration, let alone a burnt hole.

Burn marks due to strong foliar feed or splashes from liquid fertiliser would probably give brown speckles, but I would agree with everybody else with Septoria. Probably too early for blight and not the weather for it either judging by the UK weather forecasts lately.

[MKG]

Teach you, Odsox. But it wasn't scorch I was talking about - AFAIK, Septoria loves humid conditions, especially when the leaves are drenched. That's the only reason I said it. But yes - I'd tend to agree with you. I just chuck water around and have never had a problem. Lucky, I guess. But I was trying to distract attention from blight - like you, I think it far too early.

Mike

[grahamhobbs]

Agree with above, but the other thing even more similar in appearance to blight is chocolate mold.