This may be a little off-topic, but...

I remember when I lived in Phoenix, the local PBS station would occasionaly broadcast this show about the Sonoran desert, featuring the Saguaro cactus. In it, they described how the Saguros only bloomed at night, so as to attrack the attention of their natural pollinators, bats, which only fly at night. With the near disappearnce of bats, however, (add disappearing bats to the list, BTW), survival of the Saguaro was "seriously" threatened.

I suppose the show was made in the 60s or 70s, but it was completely at odds with my own observation. All the Saguros in my neck-of-the-desert most definitely bloomed during the day, not at night.

I'm giving the producers of the show the benefit-of-the-doubt, and assume that at some time in the past, Saguaros did bloom only at night. But with the diappearance of the bats, I think they shifted their blooming time, to accomodate the schedules of the regular day-time pollinators.

So what I'm thinking is this: if Saguros are able to adjust to the loss of their favorite pollinators, can farmers as well?

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PW -- Plant Whisperer