Re: CULT: Borer detection
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: CULT: Borer detection
- From: M*@fin.gc.ca (Mark, Maureen)
- Date: Wed, 13 Aug 1997 16:56:24 -0600 (MDT)
Like Bill, my husband sprays at least two times in the Spring. Three times=
=
10 days apart seems to do the trick but we don't always find the time and =
end up with the knife and sulfur. The only reason to spray in the fall =
would be if the moth had time to complete a full cycle earlier than normal. =
=
This could happen with an early Spring and a hot Summer. I would not spray=
=
in the fall until I had the first signs of borer. We have not yet needed to=
=
spray in the fall but this year could be the first.
Maureen Mark
Ottawa, Canada -- early Spring and hot dry summer
----------
From: Bill Shear
To: Multiple recipients of list
Subject: Re: CULT: Borer detection
Date: Wednesday, August 13, 1997 12:44PM
>Sharyn Hedrick wrote:
>>
>> Rick said to spary again in late fall as well. Is this after the leaves =
=
die
>> back, Rick?
>>
>
>If you mean Rick Tasco, then it was not me that said the above. We
>(fortunately) do not have borers in CA. I'm sure someone else will help
>you.
>
>Rick Tasco
>Superstition Iris Gardens
>Central California
>Zone 8
I don't think spraying in the fall would do much good. By this time the
borers have left the rhizomes and are pupating in the ground nearby. Two
spring sprayings with a systemic insecticide are usually recommended,
separated by about ten days. The first spraying should be done when the
leaves are 6" tall.
There should be some good material in the archives on borers.
Bill Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943
(804)223-6172
FAX (804)223-6374
email<bills@tiger.hsc.edu>
