black spots and yellowing leaves- help!

jscottwJune 25, 2006

the tomato plants in my raised bed have begun to get many small spots on the

underside of the leaves, then they seem to turn yellow- any suggestions?

Weve had a tremendous amount of rain recently, also I'm using a fish emulsion

as fertilizer. Thanks for any input!

Image link:

Thank you for reporting this comment. Undo
torquill(z9/sunset15 CA)

I'm not getting enough clarity off of those photos to really pin it down... but you mentioned that the spots were small, and they look quite dark. Is it progressing just a couple of leaves at a time, rather than by leaps and bounds?

Fungal spots tend to show up so fast it's breathtaking, especially in wet weather. If it's going slowly enough that you can note which leaves get it and when, that suggests a bacterial disease. If the spots are also pretty consistently small -- 1/8" or less -- I'd try treating for bacterial speck or spot, and see what happens.

Pick off the worst leaves, as they won't get any better, and throw them in the garbage can. Then pick up some fixed copper spray from the hardware store or nursery, and spray them as directed (or as close as you can -- I understand you guys are building arks out there). If and when the rain settles down, you should be able to get a handle on it pretty well.

I'd suggest mulching just on principle, but I'm guessing plastic tarps might be more useful right now. Soil splashing up onto the leaves just makes matters worse; once the bacteria or fungus has a foothold in the lower leaves, though, it spreads upward by water splashing on those leaves.


    Bookmark   June 27, 2006 at 1:21AM
Sign Up to comment
More Discussions
What is this
Is this septoria leaf spot, bacterial speck or early...
Can you identify what's happening to my Celebrity Tomato?
Just planted my celebrity tomato into a raised garden....
black spots on tomatoes
HI, As my wife and I are sitting hear having a cup...
Tomatoes - yellow leaves and one plant starting to become droopy
Hi guys, I'm a novice gardener in Queensland and have...
worst tomato plants ever
Hi I have been growing tomato plants for at least twenty...
© 2015 Houzz Inc. Houzz® The new way to design your home™