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Rollinia pollination

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Jantina starts with ...
Hi all, does anyone out there have any experience with pollinating/fruiting rollinias in an unheated glasshouse situation? My rollinia (from Daleys)has been doing well and now has flowers on it and I don't want to mess this up (still traumatized from my baby mangoes falling off).
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Jantina
Mt. Gambier S.A.
13th February 2010 9:46am
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HappyEarth says...
I'm pretty sure they are self-pollinating. There is a lone tree in Sydney botanical gardens that produces heaps of fruit each year ... delicious :)

Why aren't we seeing this fruit in the supermarkets?

Rich
www.happyearth.com.au
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HappyEarth
Wollongong
13th February 2010 10:25am
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HappyEarth says...
BTW, how old/tall is your Rollinia Jantina?
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HappyEarth
Wollongong
13th February 2010 10:29am
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trikus says...
Tip prune branches and strip leaves off this will help more flowers to form .
This is a hard fruit to pick and pack as it bruises so easily . One local grower here has a few thousand trees and sends some to the markets down south . These usually set fruit in 3 years from seed up here , mine is now 3 years old and I cant wait .
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Trikus
Tully
13th February 2010 10:59am
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amanda says...
Well done jantina! At least u know it will flower where u are? Good news for me as I will be taking mine south when we go. I am really happy with mine so far - it is tolerating our heat and wind beautifully! I have been surprised as I thought it would be fussy.
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amanda19
Geraldton. WA
13th February 2010 12:01pm
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Jantina says...
Thanks Happy Earth, it's about 150 centimetres and I got it from Daleys about 15 months ago. Thanks trikus, I'll be brave and do as you say. Thanks Amanda, it's proving remarkably hardy down here for a Brazilian tree. I've got a Wampee and a cherimoya outside and they are doing well so I'm sure yours will. Lots of luck with the moving, it's a huge job but when you are a keen grower it's worth it to find a place with the right soil, aspect and water.Permaculture has been immensely useful to me in my efforts to grow our own food forest.
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Jantina
Mt. Gambier S.A.
13th February 2010 11:41pm
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peter says...
hi jantina,
good to hear your rollinia is doing well
if you are getting quite a few flowers
then i wouldnt strip the leaves.
you would strip the leaves of a cherimoya (rollinia relative) late
autumn only if they havent fallen off by themselves to promote flowering.
daleys comments on the rollinia says that high humidity helps pollination
so spray some water on the floor of the green house or fill some trays.
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adelaide
14th February 2010 12:08am
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Jantina says...
Thanks Peter, I compromised and took off all the slightly burnt leaves (it got pretty hot in there a few days). Will keep the floor damp and keep you posted on the results.
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Jantina
Mt. Gambier S.A.
14th February 2010 8:21pm
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BJ says...
Mine flowers all year, even when 'dormant', but hasn't set a fruit as yet. I've got around 100 flowers now - has anyone tried manually pollinating, and is it essentially the same as the other annonas, just with a smaller opening and a space-ship looking flower?
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Theposterformerlyknownas
Brisbane
14th September 2011 9:10pm
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John Mc says...
I've been trying to work out how to hand pollinate both my seedling and grafted varieties as well. Google tells me they are self pollinating, (I can't find anything on hand pollinating), but to get them to set they'll take as much water as you can give them. They like wet feet, and keep the humidity up.
I'm going out to tip prune mine now, while they are dormant, actually, the new growth is just starting to push through.
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John Mc
Warnervale NSW
14th September 2011 11:23pm
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BJ says...
I've finally got a fruit on my Rollinia!
Hand pollination was pretty much hopeless. A few brickies buckets of water and some liquid potash and silica thrown at it seemed to do the trick.
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Theposterformerlyknownas
Brisbane
5th January 2012 9:31am
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amanda says...
Cool BJ! Fingers crossed for you that it hangs on and u can also give us a taste test verdict?? :)

My lychee dropped it's fruit again this year - but the wampee fruit are having no dramas....strange how u can treat plants the same but some are more stubborn about hanging on to their fruit than others..? :D
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amanda19
Geraldton. WA
5th January 2012 11:58am
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Jenny says...
Hi BJ I had a similar situation with my Rollinia, tried extra water but got nowhere. I found a great how-to on pollinating cherimoyas - http://forums.gardenweb.com/forums/load/tropical/msg0701052322783.html now i'm wondering should i thin the fruit?!
ps this is my first ever forum post
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Jenny
Brisbane
6th January 2012 10:59am
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BJ says...
Wow Jenny, that's a great set!
I've tried the hand pollination, but obviously, I'm doing something wrong!
Do you use any particular brush to pollinate the flowers? Is there any difference in fruit set on downward, horizontal and upright growing branches?
It is so tempting to keep as many fruit as possible on the tree. Keep in mind that the fruits get quite big and judge for yourself how many you think will grow and ripen on that sized tree. Mine could easily hold another dozen.
Anywho, I'm going to try hand-pollinating again early next week when (I'm hoping) we will get a bit of storm action and increased humidity.
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Theposterformerlyknownas
Brisbane
6th January 2012 6:56pm
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Jenny says...
I just used a small pointy soft brush and a mouthguard case to collect the pollen. what i did notice was that there were never any male and female flowers at the same time, so i would collect the pollen when the male flowers were mature (about 5pm), close the case and put it in the fridge till the next afternoon and then apply it with a twirl to the new female flowers, freshly dipping each time. The next afternoon those pollinated flowers became male and i collected more pollen from them and so on. no difference with branches.
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Jenny
Brisbane
6th January 2012 8:45pm
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Jenny says...
I'm very tempted to do more, don't know.. now i've gone around bagging the biggest fruits against fruit fly.
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Jenny
Brisbane
6th January 2012 8:49pm
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John Mc says...
I hand pollinated a few freshly opened flowers today with what looked like pollen from older flowers.
From my observations, the pollen only becomes available late in the stage of the flower, ie the petals are ready to fall off?
it won't take long to see if I was successful. The cv is "Sputnick" from Daleys and this is it's second year of flowering. Very fast growing tree.
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John Mc
Warnervale NSW
7th January 2012 10:10pm
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Jenny says...
just a possibly stupid question, could anyone please tell me why some of my young Rollinia fruit are getting black stems and dying? Is this just the tree aborting what fruits it can't sustain? There are still quite a number growing nicely.
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Jenny
Brisbane
5th February 2012 8:13pm
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Jenny says...
both, i gave it a little blood & bone and we just had about a week of rain
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Jenny
Brisbane
5th February 2012 8:22pm
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Jenny says...
I'll check tomorrow. i haven't noticed very many pests on it at all except the ants were just starting with their scale-farming thing - hence the trappit barrier glue you can just see on the trunk in the picture. Fungal makes sense with the rain and humidity lately. There's lots of healthy new leaves which have not been attacked and I don't think i put much fertiliser on really.
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Jenny
Brisbane
5th February 2012 9:31pm
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John Mc says...
I don't know if I fumbled it right or it pollinated itself with all this wet weather but I have one little fruitlet starting to swell nicely.
Is there any clue as to when the pollen is ripe on the Rollinia?
The Annonas, like African Pride and others have a failsafe indication as to when the pollen is ready, ie the petals open fully.
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John Mc
Warnervale NSW
5th February 2012 10:56pm
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Jenny says...
Hi John Mc, i'm certainly not an expert but i had very good success with pollination and on my tree anyway, the male flowers tended to be ripe late afternoon around 5 or later, you can tell when you tap them the anthers start falling. I collected pollen (which is the fine dust - sorry if you already know this, i didn't) from all the male flowers i could find in a plastic container and then used it, usually the following afternoon at the same time there were then female flowers ready.
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Jenny
Brisbane
6th February 2012 2:02pm
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Jenny says...
I haven't seen any bugs on my trees at all, really. As for the stems, sorry for the quality of the pictures there are no distinct spots as such but black marks, and then it is as if the stem just dries up and dies. It's now occurred to me am i spreading this (if it is a fungal disease) because i'm re-using my bags which were on fruit that have died! (because i ran out of them). However, it's not only the bagged fruit that has died. I might try the copper spray when it cools down a bit, unless anyone else has any ideas? Thanks for your suggestions Mike.
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Jenny
Brisbane
6th February 2012 2:11pm
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Original Post was last edited: 6th February 2012 2:16pm
peter says...
hi jenny
when you tap you male flowers and the
antlers drop off are you seeing a
separate fine dust, when i do it to
my cherimoyas i just seem to get antlers

at what stage (fruit size) are you geting those black stems.
if they are still tiny it may just be
unpollinated flowers.
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adelaide
6th February 2012 3:00pm
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Jenny says...
thank you Mike will give the spray a try. I don't want to lose all my beautiful fruit!.
Peter there is a great how-to on gardenweb on pollinating cherimoyas link - http://forums.gardenweb.com/forums/load/tropical/msg0701052322783.html - see pic. Just hold your little plastic container under the flower, tap madly, the anthers will fall but also the pollen 'dust'.
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Jenny
Brisbane
6th February 2012 5:42pm
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David Lee says...
My trees haven't produced much fruit either but as far as why they aren't at the markets they are very fragile, hard to handle, ship.
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David Lee
Dave
14th January 2019 11:34am
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