[Salmo]

Dithane will protect leaves from blight but will not kill that which is already there. If you have blight lesions on the leaves they will still continue to expand and put out spores. You will need to spray again after a week to protect any new leaf.

According to the packet there must be an interval of 7 days between applying dithane and harvesting the crop. That applies to both tomatoes and potatoes. That could make things difficult with tomatoes. Even after 7 days I would give them a good wash.

[Goosegirl]

I sprayed with Dithane in early June and at the end of June as it was warm and humid here but I noticed potato blight in mid July so I sprayed with Murphy's copper fungicide which says you can use at the first signs of the disease which Dithane doesn't. The blight is still there but seems to be kept at bay so I have sprayed every fortnight since then and my Golden Wonder maincrop may be saved - I hope! Worth a try.

[Yorkie]

Glad to hear the precautions seem to be keeping the worst at bay, goosegirl 

Might just be worth double checking the Murphy's packet for the maximum number of sprays you can apply per season - copper is a chemical which is tolerated in low doses but you wouldn't want to overdose on it.

[lovemyveg]

Dithane def not organic, though Bordeaux Mixture is - which I find strange. It's highly toxic to frogs and we have frogs aplenty, Gawd Bless Em. I have used BM on my toms this year though - as I couldn't bear not to have tomatoes ( I hate shop bought toms but really enjoy home grown)  - but I kept it well away from neighbour's ponds.
I lost all my broad beans this year (and I love them) as I was determined not to spray at all. Lesson learned!!

I am new to veggie growing so please forgive the ignorance.  Do Broad Beans need to be sprayed against Blight??  I know that they suffer from black fly infestation, but thought it was only toms and potatoes that got blight??  Have you tried the Aquadulce Claudia variety of BB's.  I had great success with these this year.

[Beejay]

Dithane def not organic, though Bordeaux Mixture is - which I find strange. It's highly toxic to frogs and we have frogs aplenty, Gawd Bless Em. I have used BM on my toms this year though - as I couldn't bear not to have tomatoes ( I hate shop bought toms but really enjoy home grown)  - but I kept it well away from neighbour's ponds.
I lost all my broad beans this year (and I love them) as I was determined not to spray at all. Lesson learned!!

I am new to veggie growing so please forgive the ignorance.  Do Broad Beans need to be sprayed against Blight??  I know that they suffer from black fly infestation, but thought it was only toms and potatoes that got blight??  Have you tried the Aquadulce Claudia variety of BB's.  I had great success with these this year.

No! Spuds and tom's get the blight. Broad beans get chocolate spot and blackfly!

[viettaclark]

I have just noticed what I believe to be blight (looked at posted pics.) starting on my end tomato plant and have removed the affected lower leaves. The lower fruit is also browning. I haven't sprayed with anything, which is ridiculous as I had blight last year and had to chuck a third of my crop! Just an optimist, I guess
Anyway, what is the best thing to do? I thought I would pick the lower fruit and hope it ripens indoors, then spray, to allow max. time before picking again. My plants have all been pinched out now so there should be no more leaf growth so will one spray do it? What product is most effective to stop it spreading...I've seen Dithane and Murphey's have both been recommended? Thanks guys!