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Re: CULT: Borer

From: Bill Shear <BILLS@hsc.edu>

>If the borer start their cycle this side of your winter, will the cold
>winter weather (if it ever comes) kill the larvae off?
>Just a thought - Jan Clark

It's unlikely that borers will emerge during winter.  Insect eggs (the
borer passes winter in the egg stage) undergo a process called diapause, in
which they become completely dormant for a fixed period of time.  Only when
this period is up will they become sensitive to rising temperatures and
begin to develop.  This is an adaptation to prevent just the thing that Jan
is talking about--emerging during a freak warm spell and then getting
zapped.  Diapause can occur in various stages of insect life cycles in
different species, but it usually happens in the stage that passes the
winter, or the dry season.

Bill Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943
FAX (804)223-6374

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