Backyard Aquaponics
A place to discuss aquaponics

This is happening on all my aquaponics tomato plants. Have had to pull a couple of them. It starts at the tips of the leaves and even flower sepals.
Anyone seen this or know what it might be
Been spraying with eco rose but this is not helping

Could humidity be a problem? Our tomato plants in the AP's in our igloo did well to begin with, but browned off conciderably as soon as the hot weather came. We now intend growing them in our new AP system which is set up in a drier atmosphere.

Hope someone knows - I have exactly the same situtation

Im running 100% humidity in my GH..... with daytime temps at 85 degrees (29c) and night time temps between 45-50 degrees (7-10c) ....

Havent seen that on any of my toms..... so not sure what it is..... there was a link in the forum that had a great list of tom problems......

jT

I had a bit of this happening but it has stopped.

Not sure what it was but I assumed it was to do with my system still cycling.

Deficiency somewhere?? Potassium?? Iv got banana peels added too my gb and egg shells and iron added weekly are you getting toms??

My strawberries have the same thing, I put it down to salt from when I salted to 2ppm. Have you added salt to your system?

Only to one ppt and that was a couple of water top ups ago
None of my tomatoes in the greenhouse growing in wicking tubs have this problem

Hmmm, there goes that idea!

Strawberries in same system look great. Decided to pull this small plant out and plant it in the dirt to see if it comes good. If it does, then something in the system water is not right, if it keeps going it must be a disease. Well, thats my thinking anyhoo


Roots look great



Other tomatoes are growing in the same bed where I put this one and are green all over and fruiting.

He looks how my tomatoes did before I started adding iron chelates? Could just be the runt of the litter?

Its a runt because it came up between some pavers, but it was nice and green and healthy for a while till just lately. It started with the black tips on the leaves as well

Got a couple of replies from the tomato gurus in the states and one from Keith who knows more about tomatoes and breeding them etc than anyone I know.
His thought is a lack of oxygen to the roots, and says that any seedlings he has left over sitting in tubs of water show these symptoms. Also that there are gas exchange pores near the tips of the leaves, and bacteria could be getting in here, because of the oxygen deficiency.
Another guy reckons an excess of something and maybe potassium, which is why the eco rose is not helping.
Gonna go out and put another couple of air stones in the system

If the beds are flood and drain, I doubt lack of oxygen to the roots is really the problem.

If you have been regularly spraying with eco rose then you may well have an excess of potassium and too much of something is often even worse than a lack of it since it can often lock out other nutrients.

How old is the system? Have you ever added any seasol to the system? What is the pH? And what do the other water tests say?

If you are suffering from too much potassium then you probably don't want to add any seasol right away but seasol adds lots of handy trace elements that can help things out.

Yes I suspect it may be too much potassium as I have added lots of seasol and sprayed with eco rose a few times. System has been running for just over 4 months and water tests are all 0 with ph 7.4. System is a 2000L fish tank and 1000L sump but only has 30 small fish, and this is why I have been probably getting over eager with the seasol.
System needs a top up of about 500L so this might help

Yea, enough potassium.

Perhaps if you are running really short on nutrients you might have to do the worm feeder bucket in a corner of the grow bed or something.