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RE: [OFF TOPIC] plant regulations

    Plants do so become invasive without the help of humans. You can't just
think of the process as the plant being moved away form predators. The
biology of ecosystems is much more dynamic and changing. There are many
natural surges in nature than we with our faulty image of "nature in
balance" have a hard time understanding (are we ourselves not one of the
surges?). I spend a lot of time in areas not influenced by humans. There are
almost always these surges I am talking about. Nature is not this constant
balanced thing. Weather changes, gasses in the air change, chemistry in the
soil changes, insect population distribution changes...all at incredible
rates, occilating not only year by year, season to season, but DAILY. Plants
are no exception. Exotic plants, in addition, don't always escape their
predators by being removed from their environment. Remember that there are
many bug and plant groups that are metropolitan-they in some form or another
occur everywhere. It doesn't take long for insects to find host plants I
will tell you personally from owning a nursery. They home right in on the
new stuff, often because it is yummier. It is fascinating actually because
these insects know their botany better than most humans. They know somehow
that this plant is just as good as its usual host plant and start feeding or
laying eggs. I have had several Senna species from different areas of the
world. There is a butterfly larvae that feeds on our native Sennas here in
Arizona. They always find the new leafy Sennas I bring to or propagate in
the nursery. It is annoying actually. They will find these plants (and man,
they really find them, they munch the plants almost to death) before the
plants are even a few months old!
    I am not saying that there are no problems with exotic plants, but
please don't confuse people by oversimplifying the facts. We are dealing
with complex systems here, and a very crazy set of rules from nature.

Jared R. Shortman
jared@tucsongrowers.com
Tucson Growers
www.tucsongrowers.com
(520) 882-7060
2509 N. Campbell #338
Tucson, AZ 85719


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