2. Slitherin' snakeheads
3. Got crabs?
4. Super swine
5. Too many blooms
6. Bogus buckthorn
7. Argentine ants
8. Weed of a 1,000 leaves
9. Weed-beater success story
This small field became a battleground against new weeds.
Onionis photo courtesy G.F. Hrusa, Botany Laboratory, California Dept. of Food &
Heavily branched member of the legume family, known as highly
invasive in northern Europe. First North American plants, the 0.7 acre group in
the photo, found in 1998 near San Luis Obispo, California. Immediate
eradication efforts began, with pulling and herbicides. Plant now under control.
Seeds could have spread downstream, causing wider outbreaks. In
Europe, dense colonies outcompete native understory vegetation. Proves utility
of an ounce of prevention: fast action staved off a major infestation.
Sift through our weedy bibliography.