| Quite a number of Phals, Oncidiums, Cattleyas, etc "leak" sap from joints. It is fairly common and nothing to worry about.
However, if the sap is coming from sucking insects, the plant needs to be treated. No insecticide is good for spraying directly on flowers not even the mild kinds like Safer's Insecticidal Soap but I would much rather loose flowers now to save the plant so that it will give me more flowers in the future.
I find though that insecticidal soap does not work well for scale. You'
ll probably need something more potent.
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