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fennel, carbon monoxide (+?)

Pierre A Plauzoles ae779 at lafn.org
Wed Apr 19 19:18:41 EST 1995


Some time ago, a friend told me the anise swallowtail (Papilio zelicaon) 
caterpillars he fed fennel (Foeniculum vulgare) from certain localities 
near heavily traveled roads did not do well on it.  If he collected 
foliage elsewhere, there was much less of a problem.  The specimens 
ivolved were collected and raised in the eastern part of the Los Angeles 
metropolitan area and seemed to be affected to a greater extent than 
other species.  Is carbon monoxide the problem or is there some other 
fuel consumption by-product accumulating in the foliage?

The other day, another friend told me he saw a very fresh adult of the same 
species in the immediate vicinity of a fennel plant in downtown Los 
Angeles (**very smoggy!!**) - and looking for oviposition sites.

Go figure!!

Pierre Plauzoles   ae779 at lafn.org
Canoga Park, California

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