Beetles attack Santa Fe pine forests

[Bob Weinberger]

"Larry Harrell" <lhfotoware at hotmail.com> wrote in message
news:7a90c754.0312052156.57db55bd at posting.google.com..

<snip>.
> What is their
> natural defense to (natural) bark beetles?

<snip>

> Larry,     Healthy Forestry Technician

Larry,
 I'm not aware of any natural defense in spruce against the Spruce Bark Beetle.  Since the period
between major outbreaks of Spruce Bark Beetle on a given site tends to be many times longer than that
for pine or DF on drier sites, they may not have evolved any defenses, as there was not as great a
survival advantage (for the species) in having such defenses.

BTW, those of us who have a rather long history of working in and studying forestry (45+ yrs. in my
case) tend not to be as ready, as those with much shorter histories, to ascribe the causes of most
forest "catastrophies" to relatively recent (in terms of forest life time spans) activities or
conditions.  In many cases we have seen most of these occurances (or at least seen the evidence of ,
or had the opportunity to talk with those who directly experienced such occurances) - one or more
times that happened under conditions that may or may not have close parallels to the current
conditions.


-- 
Bob Weinberger - La Grande, OR

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