yes there is.
keep it warm and humid with good air movement

In addition to Orchidguy's suggestion, you may also consider making a batch of K-L-N rooting hormone solution & hit the plant with it once a week (by misting the leaf axils & stem base) until you see the little roots forming. At least in your case, you have the base of the plant left where roots will readily emerge. I had a couple plants with stem root that just the top 6 or 8 inches of growth left. Those are REAL difficult to get the roots to start growing! Good luck!

-Ray-

Roundup is a *very* fast-acting systemic; it is worth trying, but there is a possibility that the chemical has already entered the plant's cells. If you cut as soon as it was sprayed, it probably has a good chance, though.
The horticulturists and county agents at the local AgCenter say that Roundup becomes neutral within 15 minutes after use - that is just how fast it travels through the plant. So (supposedly) if you walk through the treated area later that day, you don't have to be concerned with leaving "footprints of death" all around your garden.
Good luck - vandas are such a great southern plant - Nancy

Several smaller plants that got the same treatment (indeed, haste makes waste) died within a week or two. I only realized what I had done the next day! The top third of this vanda is still green after six or more weeks. Another large catt had all it's leaves turn yellow, but the psbs are still green so I'm not tossing it yet!

I have moved the plant where it will get better air movement and mixed up a new sprayer with a rooting hormone solution. I will mist in the mornings and hope for the best. Thx for the responses.

Sheila