Browning Leaves (forum)

Nick starts with ...
I recently received a Salathiel lychee and a Kary Carambola tree both of which I ordered off daleys. The plants looked fine and the delivery was really fast but when i potted them up and put them in my greenhouse I noticed that particularly the new growth was turning brown and drying up. Can anyone diagnose my problem?

Time: 29th December 2010 4:08pm

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About the Author Nick T
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MaryT says...
Could be mites that you need a lens to see. I had the same problem with a delivery. I think they multiply in the box, but once diagnosed, I sprayed with homemade white oil (a teaspoon of vegetable oil and a DROP of detergent in a spray bottle of water) especially the understand of the leaves and all's well within days.

Time: 29th December 2010 5:56pm

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Nick says...
Yeah I heard mites are a problem in greenhouses. Do the leaves dry up?

Time: 30th December 2010 9:40pm

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John Mc says...
Yes they look like they are drying up and look very blotchy. If you can get the right angle to the light, you can see the fine webbing they produce.

Time: 30th December 2010 10:41pm

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kert says...
Erinose mite. Rogor.

Time: 31st December 2010 10:51am

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Nick says...
Hey everybody, unfortunately the lychee isnt looking its best. It seems that the spray didnt really work and most leaves are looking very sick. The carambola definetly had mites and has recovered now (thanks btw :)) but I dont think the lychee has erinose mites because the leaves dont really look velvety, instead the growing tip seems to fry up and the lower leaves go blotchy brown around the margins. Any help will be appreciated! (sorry I hadn't posted photos earlier haha)
Pictures - Click to enlarge

Picture: 1
Picture: 2
Picture: 3
Picture: 4

Time: 3rd June 2011 7:52pm

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micarle says...
Yep same thing happened to my Salathiel!! Cleared up after one hit of Rogor

Time: 3rd June 2011 8:59pm

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Nick says...
Thanks micarle! :)

Time: 4th June 2011 9:39am

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amanda says...
Hi Nick - that's not erinose mite on your lychee :-(
Did it look that bad before you sprayed it? Did the carambolas leaves get damaged by the spray?
What did fertiliser did you give it when you potted it up? It looks awfully burnt..
Maybe just don't give it anything else except dilute seasol/seaweed - until you see some new growth..?

Time: 4th June 2011 11:16am

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Peter says...
Hi Nick,
to get a good magnifing glass is inexpensive (Dick Smith has some nice 10x handlenses for about $10) if you not already have one. So I would keep checking for investations of any kind.
However for me too,it looks more like a chemical damage most likely too much fertiliser. The tricky thing with lychee is, that they are known to respond to fertilising very very slow and sometimes it takes a long time for overfertilising to show up with symptoms and the other way around with not enough the tree keeps going healthy for a while and by the time you see the effects it is already too late and even given a correct amount to make up for it, you see the good effect not for a while. In that way, after 2 years I still try to correct an imbalance in my Bosworth 3 and I'll never know if I gave enough or too little.
Its the best to only use slow release fertilisers for lychee.

Time: 4th June 2011 2:55pm

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Nick says...
Thanks for the response Amanda and Peter, the carambola luckily wasnt damaged by the spray and the only fertiliser I gave the lychee was a bit of dynamic lifter after planting and then only liquid powerfeed and seasol. Is dynamic lifter slow release and more importantly, can I ever use it again on the lychee? Thankfully I gave it a bit of a prune and theres a few bursting buds which arent damaged :D.

Time: 4th June 2011 5:52pm

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amanda says...
Liquid powerfeed would have been enough on it's own ;-) I normally use just seasol after transplanting/repotting until the plant gets going again.
I prefer to use a good/high quality slow release fert in my pots....but even then maybe a only teaspoon at a time every cupla months, with seasol in between.
Little bits at a time are safest - and if the plant is doing well then there is no need for more - you will do more harm than good...
Dynamic lifter is reasonably slow release - but watch out for this kind of reaction with it, in pots, ....

Peter - that's interesting info...it wouldn't surprise me with lychees either..some plants just don't respond to being 'pushed' by hard core fert's very well...I think my jaboticabas are a bit like that too,...

Time: 4th June 2011 6:34pm

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denise says...
It might be a long shot -perhaps the plants are being watered with city water that has some chlorine.If so then flush the soil with rainwater thoroughly every couple of months. Subsequent growth should be normal again.It seems to affect a number of tropicals such as miracle fruit and jaboticaba.I usually keep my polyhouse closed up which minimises water usage. That means less chlorinated water going into the plants.I put shadecloth over the top of the polyhouse in warmer months to limit heat buildup and they love it.

Time: 10th June 2011 9:38am

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MaryT says...
I noticed you have it in a relatively small pot - maybe you'd like to pot it up to the next size and water it well then leave it in a warm spot protected from wind and full sun. I wouldn't add more dynamic lifter to it.

Time: 10th June 2011 1:41pm

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MaryT says...
This is the lychee that I'd come home to after being away for a couple of weeks. My friend put a pot of chilli on top of it and I think the mix in the chilli leached into the lychee pot and burnt its tips though the new growth is OK (the bits that are not eaten).

Time: 10th June 2011 1:54pm

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MaryT says...
Sorry, here's the photo (if it would load)

Time: 10th June 2011 2:40pm

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MaryT says...
Third try
Pictures - Click to enlarge
View Image
Picture: 1

Time: 10th June 2011 2:46pm

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amanda says...
It's a good point denise about the chlorine - but I have severe levels of chlorine in our tap water (tested) and it doesn't do anywhere near that kind of damage to my lychee...
MaryT - that new growth looks very pale? What's the pH of the potting mix it's in?

Time: 10th June 2011 4:40pm

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Nick says...
Thanks for the responses everyone! I dont think its the water because I water everything in the greenhouse with tank water but Im definetly going to pot it up, considering that I bought it around Christmas.

Time: 10th June 2011 5:47pm

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MaryT says...
Amanda you can see the photo? Great. No the new growth always looks pale but then green up as it 'ages'. Is that a sign of pH imbalance?


Time: 11th June 2011 6:46pm

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Wayne says...
MaryT
"No the new growth always looks pale but then green up as it 'ages'. Is that a sign of pH imbalance?"

No MaryT, this means that your Lychee is more healthy than mine.


Time: 11th June 2011 7:39pm

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amanda says...
I'd still be tempted to check the pH myself - growing in pots is a very different situation to in-ground...it's a lot more difficult for starters :)

I have a lychee in a pot too. I can see the veins on that new growth - for me - that's worth keeping an eye on...

Time: 11th June 2011 9:28pm

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MaryT says...
Thanks Amanda I'll keep an eye on it; perhaps it needs some iron?

Time: 12th June 2011 2:45pm

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amanda says...
Hey MaryT - like Wayne said - likely nothing to stress too much about - but I would check the pH of the potting mix myself...just to be sure..?
What are u fertilising it with?



Time: 12th June 2011 10:30pm

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MaryT says...
Just Seasol now and then and some slow release stuff. It's in a 40cm pot. I only bought it last year, but it has had two flushes of new growth. I don't have a pH kit; might have to buy one online. Can't get to a nursery.

Time: 13th June 2011 10:29am

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amanda says...
Hi MaryT - sounds ok - I use the same...(but mine in a 35L tree sack though..) maybe the new growth is playing catch-ups! ;-) Might be time to pot it up to a bigger container - how tall is the actual plant?

I use my pH test kit mainly when using synthetic fertilisers...and also for testing 'imported' organic composts/manures....you'd be surprised at how badly alkaline some of the manures are that u can get from the bulk suppliers...and also how synthetic fert's can end up making your soil more acidic too...
I don't use it much for the garden anymore as things are quite stable now - but I do use it for my potted plants - soil in a pot just doesn't have the same dynamics as soil in the ground...it can behave quite differently... :)



Time: 13th June 2011 3:32pm

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MaryT says...
Amanda my 'garden' is basically pots on concrete (former car space). I do have a giant jacaranda in a courtyard and some other bushes that it would tolerate but it's too bossy for anything I want to grow - in fact its roots have cracked through the concrete carspace and its shade is blocking more sunlight each year. Luckily it's deciduous so I can only look forward to November. Lucky also that the lychee and longan seem to like being in its shade but they would have to be happy being bonsai.

Time: 14th June 2011 8:33am

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amanda says...
Ah...nice tree tho' Mary T - but yea that would make it a challenge. There is good book by Kevin Handreck "Gardening Down Under" and he has a great chapter on looking after potted plants....

Time: 14th June 2011 9:37am

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Nick says...
Im thinking of buying a longan soon, do they have the same over-fertilising problems as lychees?

Time: 5th July 2011 11:09pm

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amanda says...
Hi Nick - I haven't found my longon as sensitive as the lychee - but I also don't find the longon as tough as it either.
My longon is in a tree sack and doing great (better than in gound). I use a premium slow release fert (osmocote) sparingly every few months and seasol (I do intend to plant them back in the ground when we eventually relocate)

Time: 6th July 2011 9:16am

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Nick says...
Thanks Amanda :), by not as tough do you mean cold or heat wise?

Time: 6th July 2011 3:55pm

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amanda says...
Yea - our hot n dry summer winds really knocked it around Nick...it's been in the shade house since last winter and is heaps better...my guess is they like a bit of shelter (almost everything needs afternoon shade here in the summer)

Time: 7th July 2011 9:10am

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Ioana says...
hi everyone

my lychee tree is experiencing same symptoms. I live in Melbourne, Had the tree potted in a nice sunny shaded area and all winter the tree did not lose any leaves, was very healthy looking. In about september I applied some fertilizer granules slow release, silly me without thinking it could affect the tree.

all leaves are now turning brown, new tiny leaves emerge then they become brownish. I suspect it is because of overfertilizing. Should I repot? change the soil? how can I save my lychee?

please help

Time: 18th November 2020 11:36am

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About the Author Ioana
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Ioana says...
Photos with my lychee.
Pictures - Click to enlarge

Picture: 1
Picture: 2

Time: 18th November 2020 9:24pm

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