A possible fusarium wilt on cattleya
 

Hi all,

My C. Hardyana seems less vigorous than it used to be. Some leaves turned yellow and some turned wrinkle while still green which led me to suspect that it may get Fusarium wilt. Although I highly expect to see my favorite plant to bloom this summer, I have no choice but to cut the rhizome to confirm or reject my suspicion. I found some red on the bottom circle on the rhizome section. It resembles fusarium wilt to me. I tried to save the plant by cutting along the rhizome until no red ring was found. The final result was 2 divisions, one has 2 and the other one has 4 pseudo bulbs. Please let me know what you think. Here are some photos of the rhizome and leaves.

I don't know if it's fusarium, but definitely some sort of rot.

Check your PMs.

Thank you for the feedback. I agree that whether it is fusarium or not, it must be a rot.

Most likely fusarium.
You see that purple ring on the cut section of the rhizome? That's a classic sign, also your description fits.
Fusarium does not kill plants over night, but slowly progress and eventually kill. It can take years depending on how strong the plant is.

If you keep cutting the rhizome (using a different new tool each time you cut), you may find a spot, usually closer to the newest lead, where the fungus has not yet spred into.
That's the part you want to keep.
Throw away all the older infect parts along with old potting mix and the pot.

That's what I just did and showed in a photo :lol: