3 of my poor tomato plants have started to go a bit manky on the stems. Is this tomato blight? We've never had a problem with blight before so not a clue what it looks like!
Mmm yes, that does look like it.
Move the pot to another part of the garden well away from other toms and potatoes. Inspect at least twice a day and pick off any affected leaflets as soon as they appear and burn them - keep the compost fairly dry and cross your fingers.
I did all that a couple of years ago and still got a fairly reasonable crop, and the other tomatoes weren't affected.
Depends which blight it is - Late Blight Phytopthera infestans can be quite dramatic and there's little that can be done.
Early Blight Alternaria solani, is less dramatic and can be controlled by removing affected leaves as I've described. It's important to wash your hands after removing the infected leaves before toughing healthy plants/leaves.
There's nothing that will treat blight once the infection has arrived. There are some things on the market that claim to be preventative if used before blight arrives ... I don't bother with them. I don't like spraying things I'm going to eat.
I'm afraid that GCs do recommend things - they like you to give them money for them
Frustrating isn't it? You grow stuff, look after it with love and attention and something gets, be it fungus, critters... and ends all the work you put in! Noticed today the early signs of blight in one of my toms at the allotment so I pulled it out before it spread (hopefully) to the others. Such a shame, was fruiting nicely and everything, was so sad!! I've never had tom blight before, but I've never grown toms at an allotment, in the ground, only large pots and fresh compost each year at home. I think that's the way for me in future.