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Re: Iris Borers

  • To: Multiple recipients of list <iris-l@rt66.com>
  • Subject: Re: Iris Borers
  • From: "J. Griffin Crump" <jgcrump@erols.com>
  • Date: Sun, 1 Feb 1998 17:58:20 -0700 (MST)

Dorothy Fingerhood wrote:
> Griff and all--I believe this IS the case.  (More than 1 hatching per
> season, that is.)  WOI recommends spraying beginning when the foliage is 6"
> high, then at weekly intervals until the end of June!  Here, we have
> usually had good control with 2 sprayings, but recently a commercial grower
> in the area found reports of up to 3 separate hatches in this climate, and
> attributed some of the damage they suffered to this "third hatch," which
> was unwelcome news for all of us.

Disturbing news, if true, Dorothy.  I don't like to spray Cygon more
than once per season.  I remember Charlie Nearpass saying once that all
of his seedlings were "sick" for a while, having just been sprayed with
Cygon.  For that reason, I don't continue spraying into bloom season.

Griff Crump, along the tidal Potomac near Mount Vernon, VA

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