Help w declining yellow orchid vine


Joined
Jun 23, 2021
Messages
1
Reaction score
1
Location
85284
Country
United States
I have a few yellow orchid vines that were planted about 3 months ago and are in decline. There are three factors that I think could contribute:
1) I live in PHX and we have experienced record heat in the last two weeks. They are in full sun. Despite that, the plants have never gone dry and are watered by drip system.
2) I've seen a white powdery substance mainly on the stems, both mature and new.
3) Many leaves show the spots as in the image.

I have sprayed with a potassium bicarbonate solution a couple of times (at night only). I've also sprayed once with neem oil.

I would appreciate if someone can help me diagnose the likely cause of the decline and a recommended treatment.
 

Attachments

  • IMG_20210622_171914.jpg
    IMG_20210622_171914.jpg
    53.1 KB · Views: 43
Ad

Advertisements

Ad

Advertisements

Joined
Aug 10, 2021
Messages
4,225
Reaction score
1,466
Location
California
Country
United States
Hello and welcome to the Forums.

The Yellow Orchid Vine (Callaeum macropterum, formerly Mascagnia macroptera) is not an orchid at all, but rather a woody vine in the Acerola family (Malpighiaceae). It is native to Mexico and southern Arizona. Another useful common name is Yellow Butterfly Vine.

Establishing these vines in summer in Arizona may require some additional water beyond the drip system. It is not clear to me that there is a significant pest or disease problem, but if you believe so, please do send an update with more photographs.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top