Tropical Fruit Forum - International Tropical Fruit Growers



Author Topic: Small diameter scion Bark Flap Citrus graft  (Read 869 times)

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Small diameter scion Bark Flap Citrus graft
« on: June 29, 2019, 07:53:00 AM »
Photos of a simple graft for joining a small diameter scion with a range of similar or larger diameter actively growing rootstocks. These have worked very well for me in the past.

Selected Poncirus rootstock.


Scion donor F2 citrange plant.


Scion severed from donor.


Epidermis shaved off of scion side 1.


Epidermis shaved off of scion side 2.


Shallow downward cut on rootstock - avoid cutting into wood.


Scion ready for insertion. Leaf area has been reduced to 25-30% to reduce transpiration.


Scion fitted for insertion.


Graft wrapped with parafilm.


Completed graft showing flush of growth present at time of grafting.


An example of this type of graft after 18 days. This graft will be re-wrapped until healing is complete.


« Last Edit: August 31, 2019, 05:49:51 AM by kumin »

Kelley_GA8a

  • Member
  • ***
  • Posts: 78
    • Stockbridge, GA USA 8a
    • View Profile
Re: My favorite small diameter scion Citrus graft
« Reply #1 on: June 29, 2019, 08:25:46 AM »
Thanks for the photos, Kumin! Can you do multiple grafts on one rootstock? Did you cover the graft or just use the parafilm? I have several rootstock trees that are too large to cleft graft, so I was going to resort to t-bud grafts. I recently tried a few cleft grafts, leaving the top two leaves on and unwrapped. We’ll see what happens.





kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: My favorite small diameter scion Citrus graft
« Reply #2 on: June 29, 2019, 10:25:50 AM »
As the rootstock is initially not top pruned, the number of grafts is only limited by available stem height. I use parafilm alone when the temperatures are high enough to heal quickly. If the temperatures are cooler, I use a bit of white electrical tape to secure the parafilm, I don't like to use excessive electrical tape due to low stretch and remove it after several weeks.

Samu

  • Hero Member
  • *****
  • Posts: 684
    • North Tustin, So. California, Zone 10A
    • View Profile
Re: My favorite small diameter scion Citrus graft
« Reply #3 on: June 29, 2019, 12:11:00 PM »
Another creative way of grafting;
I would like to try this method, thanks for sharing, Kumin!
Sam

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Citrus graft
« Reply #4 on: June 29, 2019, 05:45:11 PM »
Kelley_GA8a, to more fully answer your question regarding wrapping the graft: If the humidity is low and it's hot and windy, I will run parafilm up and down the graft to cover the entire graft area. Presently, humidity is high and I allow the small leaflets to remain unwrapped. It's all a matter of keeping an eye on the leaflets and avoiding desiccation. Additional wrap can be added or removed as required. Leaflets turning black, or drying up is not a good sign.

Laaz

  • Hero Member
  • *****
  • Posts: 939
    • Charleston, SC 9a
    • View Profile
    • Citrusgrowers forum
Re: Small diameter scion Citrus graft
« Reply #5 on: June 29, 2019, 05:52:50 PM »
You can also chip bud with high success on small diameter rootstock.

Bomand

  • Sr. Member
  • ****
  • Posts: 423
    • LouisianaCFDFMY
    • View Profile
Re: Small diameter scion Citrus graft
« Reply #6 on: July 03, 2019, 08:51:26 PM »
I love to top work with small stock....like to use parafilm and a walmart veggie bag..very successful.

will2358

  • Member
  • ***
  • Posts: 201
    • USA, Peachtree City, GA, zone 8a
    • View Profile
Re: Small diameter scion Citrus graft
« Reply #7 on: July 11, 2019, 08:06:15 PM »
Is that the veneer graft?
My name is Cindy

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Citrus graft
« Reply #8 on: July 11, 2019, 09:00:21 PM »
Despite similarities, this graft doesn't cut into the underlying wood on either the scion or the rootstock, except for the very end point of the scion.. The objective is to have cambium touching cambium on both sides of the scion. The length of the epidermis removed is the same on both sides of the scion. For best results when forcing the buds, it's important that the scion buds aren't too immature.

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Citrus graft
« Reply #9 on: July 13, 2019, 06:02:02 PM »
2 examples of buds emerging as the bark flap grafts are progressing. Practically all the grafts are alive at this point, and will hopefully emerge, providing the buds on the scions are mature enough.




« Last Edit: July 13, 2019, 07:55:29 PM by kumin »

sc4001992

  • Member
  • ***
  • Posts: 168
    • USA, CA, Fullerton
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #10 on: July 14, 2019, 06:24:05 AM »
Kumin, excellent illustrations and explanation.
Thank you.

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #11 on: July 14, 2019, 09:31:47 AM »
If the internodes are long enough it's possible to get one graft per bud from the scionwood.

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #12 on: August 02, 2019, 07:40:14 AM »
The thought process that went into this graft/budding process is that a flap of bark loosened from the stem will heal back to the stem if immediately securely fastened to the stem. By inserting a thin scion with the cambium exposed on both sides, it will also be included in the healing tissues. When I initially started Citrus breeding decades ago, it was my only method of graftage.
« Last Edit: August 02, 2019, 03:52:46 PM by kumin »

sc4001992

  • Member
  • ***
  • Posts: 168
    • USA, CA, Fullerton
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #13 on: August 02, 2019, 08:06:11 AM »
Your method works very good on these small scions.
Very helpful information.
« Last Edit: August 29, 2019, 02:12:43 PM by sc4001992 »

Florian

  • Member
  • ***
  • Posts: 195
    • Solothurn, Switzerland.
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #14 on: August 03, 2019, 12:14:00 PM »
Thanks for this excellent tutorial! I shall try this method too.

kumin

  • Member
  • ***
  • Posts: 179
    • USA PA 6b
    • View Profile
Re: Small diameter scion Bark Flap Citrus graft
« Reply #15 on: August 29, 2019, 11:44:23 AM »
Follow up photos as these grafts have developed further. I'm pleased with most of the scions' growth. Next concern is getting the new growth to harden off for winter. The grafts made lower on the Poncirus rootstock appear to have grown more than the grafts placed higher. I don't know if this is only a temporary response or not.






« Last Edit: August 29, 2019, 12:27:17 PM by kumin »

 

Copyright © Tropical Fruit Forum - International Tropical Fruit Growers