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  #21  
Old 10-19-2007, 06:17 PM
quiltergal quiltergal is offline
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Wow Mauro! I'll give you more than one cent for that contribution! Thanks. So in a nutshell you are saying that this is a plant defense mechanism? I'm assuming that ants in South America are something to be avoided kind of like our fire ants in the southern states. Makes perfect sense. Who would want a mouth full of fire ants??!!
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  #22  
Old 10-19-2007, 11:34 PM
Rosim_in_BR Rosim_in_BR is offline
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Quote:
Originally Posted by quiltergal View Post
Wow Mauro! I'll give you more than one cent for that contribution! Thanks. So in a nutshell you are saying that this is a plant defense mechanism? I'm assuming that ants in South America are something to be avoided kind of like our fire ants in the southern states. Makes perfect sense. Who would want a mouth full of fire ants??!!
Yes, that's the conclusion researchers picked up from their analyses. As for the ants, as far as I am concerned I want them far away from me !
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  #23  
Old 10-20-2007, 10:56 AM
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Cattleya sheaths, dry why? Yellow dead looking - Male
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If you think about it, the two aspects of that make a lot of sense:

First we have to consider the "survival instinct" of all living creatures and the drive to reproduce and extend the gene pool, but then we might want to bring in a bit of "Maslow" thinking - hierarchy of needs.

If a plant is not growing under optimal conditions (thinking back to Andy Golley's comments), it is having to work hard just to survive, so all of its energies are focused on that. Once it is in a "comfortable" spot culturally, it can afford to "waste" some of its energy supply (the sugary sap) in order to attract some external defenders.

The only "gotcha" on that is that those exudates attract parasitic insects as well. In fact, ants have been known to "farm" them on orchids, as insects like aphids exude their own "honeydew" that is apparently more to the ants' liking.
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  #24  
Old 10-20-2007, 05:31 PM
Leisurely Leisurely is offline
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Thanks for sharing your experiences Andy. I will no longer feel like a failure now if I don't get every sheath to bloom.
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