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Comment by Shaun Mavronicolas on December 3, 2011 at 4:38pm

No, not spider mites here... I was looking at the bottom left tomato picture... that's definitely not spider mites. That's not to say you don't have spider mites or that you've a combination of issues. To me it looks like Edema of sorts. We're busy reducing our sulphates to take that off the list of possible causes. The sulphates in our case are likely making the plant "hold" onto water, and hence the plant cells are bursting, causing the chlorosis, even when the humidity levels are "normal". This is just my understanding and interpretation of what's happening with our plants. The signs still also hint at potassium though this could simply be "lockout" due to pH or too much calcium, I'm still getting to where I can identify this properly.

Comment by Tim McNabb on December 3, 2011 at 4:07pm

If your tomatoes are looking like mine, it;s not potassium, it's spider mites.  I dusted the leaves with diatomaceous earth, taking care to get the undersides.

This cleared them out on the tomatoes and the beans.

Comment by Shaun Mavronicolas on December 3, 2011 at 3:44pm

Hi Tim, I am very curious about your tomato "analysis" in that you say suspected potassium deficiency...

We have exactly the same issue, it is in fact on most of our fruiting plants, but the tomatoes are certainly the worst. Would love to chat about this further with you....