Tomato Leaf rust spots, Alternaria ?
 

I think I (my plants) have a case of Alternaria
http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/leaf/alter_cank.html
But my spots are more rounded. So it may be Grey Leaf spot. I'm not
sure. New growth looks good, but the old (2weeks) is affected.
Anyway, what is a good fungicide? I'm trying the Copper based Ortho
fungicide for starters.
I'm in Zone 6, and its been cool & rainy lately.

Any other recommendations?

Cheers

Tomato Leaf rust spots, Alternaria ?
 

Martin Riddle wrote:
I think I (my plants) have a case of Alternaria
http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/leaf/alter_cank.html
But my spots are more rounded. So it may be Grey Leaf spot. I'm not
sure. New growth looks good, but the old (2weeks) is affected.
Anyway, what is a good fungicide? I'm trying the Copper based Ortho
fungicide for starters.
I'm in Zone 6, and its been cool & rainy lately.

Any other recommendations?

if you have good new leaves/growth
take off the affected older leaves
ASAP. no need to leave a source of
fungus spores hanging around.

skip the fungicide. good air flow
and some sunshine should give the plant
enough energy to outgrow this kind of
trouble.

if you are growing a susceptible
variety you might want to change your
selection next season or even replant
(i think it's just early enough for
your zone) if you really feel like you
have to. (i wouldn't as i think the
plants can come back from this sort of
trouble)

good luck, :)


songbird