35th Wffc Bih 2015

World Fly Fishing Championship 2019

Whip and Tongue Grafting Demonstration

Whip and Tongue Grafting Demonstration

Today, Keith Park is going to demonstrate
a safe method for creating a whip and tongue graft. Keith is a horticulturalist
and an arborist with the National Park Service. Grafting is the ancient method
for joining two woody plants together. This is done to join a cultivated
variety with the rootstock, and it’s very common in fruit trees and other
cultivated trees and shrubs. Whip and tongue graft is one type of grafting, and
while it’s an excellent method, it can be hazardous. Keith is going to demonstrate
a technique that protects your fingers and hands from cuts. Keith Park:
I’m going to demonstrate how to make a whip and tongue graft for a fruit tree using two pieces
of material: a rootstock and a scion. Grafting is basically simply the joining
of two pieces of material. First step is to prepare them by cutting the ends
flush and making sure they’re not jagged or anything.
Next requires the use of a specialized grafting knife, such as this one. A
specialized grafting knife is beveled on one side but perfectly flat on the other.
The reason for this is that the flatness of this side allows the cut to be
perfectly flat, unlike using a regular knife which has a slight bevel on both
sides, which will create a slightly concave cut. The problem with a slightly
concave cut is that the two pieces won’t mate very perfectly. They should be flat,
like that. Now, the technique for making the cuts themselves is pretty simple,
although it can be dangerous. This part is pretty straightforward: I lock my arms
together, grip the knife and the part very carefully, and make a forward motion like
that, and I do that on both pieces of material. As you can see, the grafting knife makes
a nice flat cut. The next step is to make a back notch on both pieces so that the
two pieces lock together. Otherwise, they might just fall apart like that, even if
they’re wrapped. To make the back cut, I firmly grasp the piece of root stock or
scion, and I choke up on the grafting knife like this. It’s very important to
keep your fingers and hands tight together. I lock my thumbs and my
knuckles together, and start my back cut about 3/4 or 2/3 of the way up the initial
cut. You are putting the knife – pushing it back towards your hand, so you have to be
very careful that you don’t push too hard, but by having your hands locked
together in this fashion, even if the knife does slip a little bit
it won’t go very far, because your hands are already locked together. I use slight
wiggling motions just to get the blade started, and push it carefully about a
quarter-inch into the material to make the back notch.
And on the scion piece, as you can see I have my hands locked together firmly again,
and I make my back cut with small wiggling motions. And lastly, you join the
two pieces by joining the back cut piece together and pushing firmly. Not enough
to split the two pieces down the lengthwise, but enough so that they match
up as firmly and flush as possible. Sometimes you won’t have pieces that are
matched perfectly in diameter, which is okay. What’s important is that you match
at least one side – left or right – so that the cambium layers can fuse. After the scion and rootstock are joined the graft union is wrapped with biodegradable tape. The grafted tree is immediately potted
for a period of establishment before planting out in the field.

2 thoughts on “Whip and Tongue Grafting Demonstration

Leave comment

Your email address will not be published. Required fields are marked with *.