What is this strange under the leaf of my Stictocardia

This is a leaf from my Stictocardia 'Thai'=from Thailand.
There is a lot of strange things under all leafs,
it is white like oblong crystal, but they are not hard?
More sugary and sticky
Sylvia

Hi Sylvia,

It is very common for Stictocardias and will not harm the plant.
I can't remember the name and I'm sure I have it saved somewhere - so I will search for it.
If Ron is around, he will probably know.

Emma

Hi Sylvia... like emma said, it won't hurt the plants... i used to think that it was odema as the same thing happened to me:
http://davesgarden.com/community/forums/t/975540/

but now i think it is natural to the plants...

i've read on the net that Stictocardia means spotted/dotted heart... which is supposed to refer to the black spotting on the backs of the heart shaped leaves... the growths will soon turn black and the plant seems to suffer no ill affects...

Colin

This message was edited May 21, 2009 7:47 PM

I had the same on mine many times. I just wiped it off gently so as to not damage leaves and nothing happened !~ nice to know it is nothing to wirry about, for sure.
:Darren

well maybe not for sure Darren.... i've only had them a few months :-S

congminglaoshi said the leaves on his died :-s
http://davesgarden.com/community/forums/p.php?pid=6415926

Colin, your plants are looking great. Are you giving them any Iron? , such as in bloodmeal? Frank

wow maybe good i wiped it off!!!! The pic of it was great to ID with Sylvia. I hope your plants do OK ~wipe it off with gentle fingers and check it daily?!!
:D

Thanks everyone then I´m not worry of this.

But Colin my other Strictocardia beraviensis from Barbadine Réunion (France) have not this on the leaf.

Sylvia

it is on both my S macolusoi from South Africa and S bereviensis from Thailand...

this pic S macolusoi showing the black dots...

and this pic S bereviensis 'Thailand' showing the dots still pale... they get darker as the leaf ages....

it really does look like some sort of pest or disease.....though, i'm hopeing it's just part of the plant as they seem very healthy....

Frank... i'll try the dried blood... thanks for the tip...
Darren i've wiped some leaves and left others... we will see :-)

maybe its a mixture of both natural dots and oedema?

with the dots on the back, that look like insect eggs, being natural and the more warty looking growths, that also seem to appear on the top of the leaves, being oedema?

just a thought

crickey Colin those black dots are strange. it would worry me. the whitish proturbances are less threatening looking to me, where as teh black is in the leaf~ hmph? Gonna go loook at some of myne yours are inside, growing aren't they...?
d

it may be something related to growing inside? Becky and Debra both are inside growers (well they just grow more than I do~lol) maybe theyrecognize it? I looked at mine outdoors as of today only a few bug munches, thanksfully...

yes Darren mine are inside... mmmm?

I grow mine inside

maybe something to do with drying out between watering then Sylvia?... is yours in a pot or in the ground Darren?

This message was edited May 22, 2009 4:47 PM

mine currrently outdoors in a container. I have a couple from ground but those are NOID and just babies, not sure if keeping because have to watch for heat damage pretty soon and the ones in ground are better suited for survival in the heat. I put Polysorb crystals in the pots though,and, it helps. Tha I. Abivenia is also in container, so I can keep it in correct amount of sun vs. the heat :)
:Darren

My impression is the the unusual growths are not the beginning stages of the dark glands that are reported to be characteristic of Stictocardia...

There may be a relationship between being grown indoors and the protuberant growths...

I had tried to over-winter some Stictocardia several years ago but the roots decayed...but they did develop the unusual growths inside (!)...

I wonder if any of the people who have been posting their outdoor grown Stictocardia on the Vines and Climbers forum here
http://davesgarden.com/community/forums/t/938911/
have noticed any of the same growths...

Perhaps the mysterious factor(s) can be unraveled...


TTY,...


Ron

Colin -

You Win!
It is Edema

I just called Logee's and they confirmed that it is Edema. sometimes spelled Odema

Also see their site:
http://www.logees.com/ftg/CULTURAL-stictocardia.asp

U Mass [Lots of info here]
http://www.umass.edu/umext/floriculture/fact_sheets/greenhouse_management/edema.htm

Cornell Univ
http://plantclinic.cornell.edu/FactSheets/oedema/oedema.htm

Also read in the PlantFiles under Gardeners' Notes:
http://davesgarden.com/guides/pf/go/168689/

Positive JRush On Jan 20, 2006, JRush from Guilford, CT (Zone 6b) wrote:
I purchased a small specimen from Logee's, & within 2 months it was loaded with buds. It is unusual for them to blossom in January, but Logee's confirmed theirs were also in bloom. Edema may form on the undersides of the leaves, due to fluctuations in temperature or humidity, but will not harm the plant. Pruning will ensure a bushy compact form. Blossoms seem to last a day or two, & have a sharp scent - not at all sweet!
Julie


Emma

I just checked my S. maculosoi from silverhill seeds, and I am seeing some little black whiskers, pretty sparce. This plant spent last summer and all the winter in the shower window with none of these , but with the steam of showers of 3 people. A month ago, I moved it into the living room and it put out two more vines, both to the ceiling now.

I am wondering if this is a natural defense behavior of this group. It might be intended to
attract "guardian ants" in the habitats where it is native. It is quite possible that these species are subjected to swarms of leaf devouring insects that the guardian ants keep away. I don't think I want that many bugs in the house for observation. The leaves are quite large, also this might compensate for devouring insects... Frank

Thanks Emma, I read on Logee's page. The physiological condition of edema can be a problem when grown indoors or in greenhouses. I can only grow this indoors or in my greenhouse because we have to cold here even during the summer. Only around 30 degree in the nights here.
One question, how soon from seeds do they start flower?

HI Sylvia,

I'm not sure when you will get blooms growing your Stictocardia inside - or if it makes a difference. In a tropical area I have heard that they will bloom in the 2nd year from seed. Ron or someone else may be able to answer for you.

Emma

Well...the greenhouse grown plants seem to flower at different times (Spring ,Summer,Autumn) and it may be that the greenhouse grown plants have had their usual cycle thrown off in some way...the Stictocardia always seem to flower better in the warmer zones...

The Stictocardia plants grown from seeds are likely to flower late summer from the usual reports...

TTY,...

Ron

Ok I understand, it seems that this one is not so good to grow in Sweden
And I notice every year, that the most plants seems to be much healthy and fresh when we grow outside, and in our climate it´s better to grow less tropical kinds.

I have the same experience with nil, but Emma, yours fujishibori, in my kitchenwindow have already start to flower. The most Nil I´ve grow earlier have not flower until the fall or winter.
But I dont think there will be any seeds.

I have also success with caudex, Ipomoa andersonii and platensii they like it on my porch.
Sylvia

oh thats lovely Sylvia... i think i might have to reconsider the tropical vines and maybe concentrate on the caudex forming types.... i have a few seeds left of some caudex types, i'll pop them in the post to you if it's not to late?
Sylvia

Sylvia (and Colin, too!) - Your Fuji Shibori is gorgeous! I am sorry to hear that the "tropical" MGs don't do as well for you due to climate and temps. There must be some way that you can increase your odds. Any way to make a green "room" with warmer temps and lots of light?

i was thinking growing shelves for this winter becky but i do have a spare room....... i wonder... i think Debra had some kind of green room.... i check the threads

Colin - I remember Beth and Shawna both had these cool indoor grow rooms with a nursery full of MGs that were doing amazingly well despite the cold temps outdoors. They had JMG blooms way before even me! LOL!

mine bloomed and it was snowing outside in march and the plants are still doing well and will go outside before the weekend so they can finally be let loose to climb to their little hearts content

My Fuji Shibori are indoors, probably because of that it flower already, other year, nils flower to the late fall and winter here. So this is a surprice to have a nil flower in may. I´m happy.
Also must show a picture at my bulb to Ipo. andersonii which start to sprout this week, I have wait for a couple of weeks for any indication of life.
It´s a beauty this one too.

Looking forward to seeing your Ipomoea andersonii blooms Sylvia.
One of my favorites.