This orange tissue is making my grafts fail. Help!

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eamnav215
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Joined: Thu May 03, 2018 2:05 am

This orange tissue is making my grafts fail. Help!

Post by eamnav215 »

Hello, I'm a fellow grower from Costa Rica. I've been growing cacti for over 4 years now and doing a lot of micrografting.
I usually use selenicereus grandiflora and pereskiopsis, both of those grow very well in my climate.
Nevertheless, I sometimes have problems with this stuff. I haven't being able to determine what is causing this to appear in my graft unions. The scion usually grows for a couple of weeks and then gets stuck. I Always wash my hands before grafting and clean my tools with 70% alcohol and a flame. I'm thinking on using 96% etilic alcohol.

Usually, this layer stays as is, a layer.
But other times, it grows (also the scion) and makes some kind of necrotic cork.
Usually, regrafting is the solution, and it just goes away. It only happens with micrografts, I haven't seen this problem in regular grafts yet.

Image

Any suggestions in how to avoid this issue?
cacthis
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Joined: Sat Oct 28, 2017 3:45 am

Re: This orange tissue is making my grafts fail. Help!

Post by cacthis »

when this happened to my grafted plants, I assumed that it happened because of unsanitary blade or because the scion was rotting
eamnav215
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Re: This orange tissue is making my grafts fail. Help!

Post by eamnav215 »

cacthis wrote: Thu Jul 01, 2021 11:59 am when this happened to my grafted plants, I assumed that it happened because of unsanitary blade or because the scion was rotting
how do you sterilize your tools? If I may ask.
cacthis
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Re: This orange tissue is making my grafts fail. Help!

Post by cacthis »

I used alcohol to wipe the knife
Pereskiopsisdotcom
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Re: This orange tissue is making my grafts fail. Help!

Post by Pereskiopsisdotcom »

My gut feeling is your problem is airborne or in the soil. I've been grafting on Pereskiopsis for about a decade now and I would see that orange colour on failed grafts only when I had the humidity too high with something like a dome covering the plants and too much stale air.

There have been a number of times that I've been in a rush and forgot sterilization, never encountering that problem. There have also been times that I have sterilized like I was worried about Covid and I still got that color and failed graft.
http://pereskiopsis.com

Interests include: Rhipsalis, Turbinicarpus, Gymnocalycium, and Lophophora.
eamnav215
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Re: This orange tissue is making my grafts fail. Help!

Post by eamnav215 »

I've been grafting with parafilm. I'm from Costa Rica, so my humidity Is always high :lol:
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Charlie VIII
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Location: Bristol, UK

Re: This orange tissue is making my grafts fail. Help!

Post by Charlie VIII »

Looks like a fungal issue to me, with the high humidity it wouldn't be a surprise
- Charlie
Bristol, UK
eamnav215
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Re: This orange tissue is making my grafts fail. Help!

Post by eamnav215 »

Charlie VIII wrote: Sun Jul 04, 2021 5:22 am Looks like a fungal issue to me, with the high humidity it wouldn't be a surprise
How could I reduce humidity without the scion getting dehydrated?
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Hanazono
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Re: This orange tissue is making my grafts fail. Help!

Post by Hanazono »

G'day eamnav215,

Your stock is a selenicereus.
The grafting is a micro-grafting.
A. parafilm is used for the grafting.

Please let me know the size of scion.

Frank
eamnav215
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Re: This orange tissue is making my grafts fail. Help!

Post by eamnav215 »

Hanazono wrote: Wed Jul 07, 2021 12:42 am G'day eamnav215,

Your stock is a selenicereus.
The grafting is a micro-grafting.
A. parafilm is used for the grafting.

Please let me know the size of scion.

Frank
Between 3 and 5 mm,I usually graft 2 week old plants. Most problems with ariocarpus. I bought a box today, I'll try your humidity box method.
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