On Sep 10, 2011, at 4:31 PM, Jane Shevtsov wrote:

> What fraction of the "weeds" affecting agriculture are native?

Good question. Don't forget the corollary: what fraction of the crops being 
affected by "weeds" are non-native?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Madhusudan Katti
Associate Professor of Vertebrate Biology
Department of Biology, M/S SB73
California State University, Fresno
Fresno, CA 93740-8034

Email:  [email protected]
Tel:            559.278.2460
Fax:            559.278.3963
Lab:    http://www.reconciliationecology.org/
ULTRA:  http://urban-faces.org/
Blog:   http://leafwarbler.posterous.com/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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