crown vetch


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crown vetch

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We examined the distribution of crown vetch seeds in the persistent soil seed bank at the Boone site and at the Western Research Farm.
On 21 June 2005, a 4 m transect was run through a patch of crown vetch.
Because we found no evidence to support the hypothesis that crown vetch builds up a large seed bank (see results), and because mowing has been shown to be ineffective in crown vetch control (Symstad, 2002), we examined the ability of crown vetch to regenerate from vegetative fragments.
We aged a total of 287 roots from the three crown vetch patches.
The total area of all crown vetch patches at the Boone site was 3060 [m.
No crown vetch seedlings emerged from any of the soil samples at either site.
If crown vetch patches spread in distinct patterns, understanding these patterns would be very useful in developing methods for controlling this species.
Crown vetch is quite difficult to eradicate once established.
While many crown vetch invasions are probably initiated by seed, as it has been reported to invade sites not directly adjacent to plantings (The Nature Conservancy, 2003), asexual reproduction appears to be much more important than sexual reproduction in explaining the persistence and resilience of established patches.
Specific antidotes for crown vetch toxins are not available.
If methemoglobin formation is a manifestation of crown vetch toxicity in birds, then part of the treatment for crown vetch poisoning would be intravenous methylene blue.