[NAFEX] Controlling Crown Borers
hangermayer at isp.com
Thu Jan 24 13:25:48 EST 2008
Your advice on cane borer has been helpful, but I'm not sure crown borers
are as sealed inside the plants as cane borers. I think there may be holes
for the insecticide to flow into. Personally, I've not read about drenching
the roots, but about drenching the soil, with insecticide which kills the
larva as it tries to pupate and hatch in the soil. I think a root drench
might work, but unless they are transplanted a long way from any other
brambles, the moths will probably just come right back. But as I say it's
all a mute point anyway unless you have an applicators license.
----- Original Message -----
From: "Jim Fruth" <>
To: "NAFEX" <nafex at lists.ibiblio.org>
Sent: Thursday, January 24, 2008 11:49 AM
Subject: [NAFEX] Controlling Crown Borers
> May I save you some time? Re your post (below), you need green leaves
> to get the insecticide inside the plant. If the roots are growing and the
> insecticide molecules small enough, the plant maybe/might/possibly up-take
> that way otherwise you'd have to soak the roots a l-o-n-g time to get at
> How long have you been a member? Do you read the Pomona? I wrote an
> article about controlling cane borer just a few Pomonas ago. Controlling
> crown borers should be similar and you don't have to dig up the plants.
> Hi Mark,
> No answers from Nafex...
> I have read about the critters and it looks like the only way to get rid
> them is to drench the crowns with insecticide.
> I don't really want to do that and so will dig all the roots up early in
> spring and do an insecticidal soak in some buckets before transplanting
> to a new place.
> If you can remember in the fall, I'll know for sure if it worked.
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