Grapevine grafting

I’m in the process of bench grafting various grapevine varieties onto IAC 572 rootstock.

I started by grading the rootstock for diameter, straightness and internode length. Because of this I’ve been able to use an omega grafting tool and the fit has been really well. I’m starting to get into mismatched sizes so am looking at switching over to whip and tongue, and chip budding to get better cambium alignment.

The rootstock had been soaked for 8 hours and treated with Abamectin, then put into the fridge for 2 weeks. Apparently the cold stratification works well works really for this variety. (https://www.researchgate.net/publication/326990351_Development_of_rootstocks_grapevine_and_cold_stratification_time)

It’s grafted, wrapped in parafilm and super tight around the union, loose around the bud, with the top enclosed and tied off. I do 8 at the time leaving them to soak in the water. I then take it out, remove the rootstock buds, snip off again about 15-20mm from the bottom node. Using my grafting knife remove about 10mm of the outer layer exposing the cambium, dip in clonex gel for 5 second and put into the pre soaked medium. The medium is 3pts peat moss, 2 pts coco husk, 6pts perlite.

This is in Thailand so humidity hangs around 90%, but gets to 70 late afternoon. So I water in the mornings and mist every hour while I’m grafting. Thinking of putting some bags over them though. Temperature is between 23-30c.

No idea how this is gonna go down. IAC 572 roots really well so no worries there, but interested to see the success rate of the grafts.