For orchid owners, how have you dealt with scale and sticky honey dew on a dendrobium orchid?

For orchid owners, how have you dealt with scale and sticky honey dew on a dendrobium orchid?
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answer:I take it is caused by aphids? Can you get some lady bugs? Put it outside and let some lady bugs loose. Sounds like it may be greenfly, one website suggested this: Sulphur/fatty acids, insecticidal soap, Dimethoate, Malathion
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