Crabgrass' secret: The despised weed makes herbicide to kill neighboring plants

Well, crabgrass does make good grass whistles :)

http://www.eurekalert.org/pub_releases/2013-06/acs-cst062613.php

Public release date: 26-Jun-2013
Contact: Michael Bernstein
American Chemical Society

Contrary to popular belief, crabgrass does not thrive in lawns, gardens and farm fields by simply crowding out other plants. A new study in ACS' Journal of Agricultural and Food Chemistry has found that the much-despised weed actually produces its own herbicides that kill nearby plants.

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