Date: Fri, 12 Oct 2007 17:04:19 -0700
Reply-To: Tracey <traceson@YAHOO.COM>
Sender: Georgia Birders Online <GABO-L@LISTSERV.UGA.EDU>
From: Tracey <traceson@YAHOO.COM>
Subject: Re: Hemlocks and Birds
Content-Type: text/plain; charset=iso-8859-1
There is also a significant cost involved.
--- Eran Tomer <etomer@EMORY.EDU> wrote:
> Please see answers in-line. I will refrain from
> posting more on this topic
> on GABO, though, since it is moving out of scope.
> > If the beetles are "quite effective" against the
> woolly adelgid as stated in
> > the earlier post, then why are the Hemlock forests
> at such risk as we keep
> > hearing?
> Because the effective solution is slow to implement
> at the needed scale.
> The adelgid affects a vast area in the East,
> including places that are
> very difficult to reach, and spreads rapidly.
> Predator beetles are not
> (yet) raised on a massive scale for various reasons,
> including a need for
> specialized facilities and a shortage of funds. The
> goal is to create
> self-sustaining beetle populations in the wild, as
> in the adelgid's
> natural range (Asia), that will spread and keep
> controlling the pest
> long-term throughout the region. This is not simple
> to achieve and takes
> time, and in the meantime the adelgid keeps wreaking
> havoc. We know
> hemlock losses will be heavy but, with the beetle's
> help, the war should
> be won.
> > There's no mention of the actual use of the
> beetles in Georgia, just the
> > potential use. Have they been used here? If so,
> have they been "quite
> > effective"?
> Predator beetles have been released in Georgia too
> but I don't know the
> particulars. DNR folks will probably know more.
> > Why hasn't every at-risk acre been long-since
> treated with beetles?
> The beetles selected for propagation feed almost
> exclusively on the
> adelgid - a fundamental consideration when
> introducing an exotic predator
> to control an exotic pest. Hence, the beetles will
> only become established
> in areas already infested with the adelgid. The
> beasts usually takes 2-4
> years to kill a tree so beetles have time to move in
> and destroy them.
> Also, there are millions of at-risk acres and many
> are inaccessible or on
> private land.
> Best regards,
> - Eran Tomer
> Atlanta, GA
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