This totally supports the "test" done by one of our society members, Kay Klausing, who has done a lot of work investigating orchid virus (protocols and transmission). He put together a series of photos, and presented them to a large number of people with considerable expertise - judges and very experienced growers. Flowers and leaves were shown. The results for trying to identify virus infection visually was no better than chance - they would have done as well flipping a coin to determine "yes or no". You cannot determine, with any certainty, the presence or absence of virus without testing. There are lots of reasons other than virus for a plant's failure to thrive and plenty of plants that are thriving and are nevertheless infected (and capable of infecting other plants).
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Hybrid Mode
