Manfred asked for advice from Catasetum plant experts. I don't profess to be an expert nor do I have a solution to his issue. In fact I don't generally give advice unless I have learnt about a resolution directly and then only with a preface under my conditions. I hope " the internet" ( geez ! ) can see that I don't make over the top comments, use hyperbole and rhetoric and throw around labels in an unsuccessful effort to obfuscate.
For the sake of clarity I have copied below what I said and what triggered your comments. The phrase he "doth protest too much " springs to mind. Look it up.
"Many people repeat and pass on what the "experts" say without any direct experience. For most people that is probably OK, but it is very frustrating for people like me who are genuinely interested in expanding their knowledge, to the point of actual seed propagation. I have tried all the methods to get either male or female blooms. Nothing has worked for me.
I am not sure of what theories Anthony Trewavas espouses but if based in science and not hearsay, then he's ahead of most".
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fine print - anything I say cannot be used against me and ymmv on any growing advice