Re: CULT clay soil, deer and borer
- Subject: Re: CULT clay soil, deer and borer
- From: a*
- Date: Fri, 14 Jun 2002 16:20:58 -0000
--- In iris-talk@y..., "irischap" <irischapman@n...> wrote:
>
> > The borer ugh! The end of october I cut all iris down to three
> inches and got
> > rid of that debris. I think the iris are pretty much dormant
then
> and we are
> > cutting off the leaf part that eggs were laid on in September. It
> seemed to
> > help.
> > This spring while digging I found some borer pupae that had not
> > hatched/matured and they were still viable. This tells me the
> borer has a
> > continuing life cycle not a set one as we thought. The same thing
> happened
> > last year and I wrote Bill Shear and offered to send them to him.
> But I guess
> > he doesn't want the borer either!! I do think this bears studying.
> > Doreen F. McCabe gardenhous@a...> >
> >
> I have speculated for awhile that some borer overwinter and hatch
in
> spring, especially in colder climate areas.
>
> Chuck Chapman, Guelph, Ontario, Canada
I think there are two life cycles, with one cycle wintering over. I
also beleive that the two cycles have different spring cycles. I
can't really prove my contention because I have used granular Merit
for the last three years and borers have decreased dramatically.
During post bloom cleanup I found borers in two iris planted outside
the established iris beds. These do not get the attention as they
were leftovers and just stuck in the ground for filler. One thing I
must do is to respread the Merit to catch the second batch of new
hatchlings.
Al Bullock
Z7 No Va
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