[CANUFNET] CANUFNET Digest, Vol 59, Issue 2

[vince rutter]

Spraying a 70 tree is difficult but not impossible with the right equipment.
We have done pyrethrin treatments for aphid control but in the case of large
trees we have done ace cap treatments.  Ace caps work very well but they are
very invasive to the tree and I would never do more than two treatments in a
5 year period.  

               As far as I understand the new legislation, arborists can
still use many banned pesticides if a qualified individual (accredited
arborist or RPF) recommends the treatment as needed to save the tree.  This
means we can still spray acephate, carbaryl and even use Cygon for root
drenches.  Ace caps are still useable as well.  

               Do CANUFNET'ers have any thoughts on ace cap use?  Is it
better to use a localized application or better to spray and deal with drift
issues?  Maybe a wider registration of Treeazin would be better but that is
still wounding the trunk.

               It's difficult to interpret pesticide labeling and
legislation and I have yet to find a reliable source for information, other
than legal mumbo jumbo.

Vince

Vince Rutter, R.P.F.

807-627-6201

cid:150335916 at 19102007-103F

From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net]
On Behalf Of Glenn Chernick
Sent: Friday, October 02, 2009 12:47 PM
To: canufnet at list.web.net
Subject: Re: [CANUFNET] CANUFNET Digest, Vol 59, Issue 2

 

What I would suggest is just spraying the tree down with water once or twice
per week, could use a pressure washer, just on the undersides of the leaves.
Customer could also use yellow sticky traps in their yard or a yellow kiddie
pool with a drop or two of soap in it.  Insecticidal soap would as a foliar
spray if you applied it 2 or 3 x per week for 2 weeks.  But you might not
get any better control than using the water in bad aphid years.

Glenn Chernick

Forestry Technician

City of Regina

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Today's Topics:

   1. aphid infestation in Basswood (Bartram Woodlands)


----------------------------------------------------------------------

Message: 1
Date: Thu, 1 Oct 2009 15:35:07 -0400
From: Bartram Woodlands <bartramwoodlands at sympatico.ca>
Subject: [CANUFNET] aphid infestation in Basswood
To: Canadian Urban Forest Network <canufnet at list.web.net>
Message-ID: <BLU0-SMTP91BC4B7A98AB5A75524D41E9D30 at phx.gbl>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

Um, I have a client with a 70' Little leaf Linden in Backyard, covered  
in soot from heavy aphid infestation throughout this year and dates  
back to late summer last year.

Tree is dripping honeydew on nieghbouring property and all plants/ 
shrubs in garden now sooty. How do you spray a 70' tree repeatedly to  
remove aphids?  Do oil sprays work in spring? Aphids are now gone,  
likely in bark I presume. Would imidacloprid be effective. Guelph has  
banned cosmetic pesticide use.
Tree although healthy seeming is boxed in by other trees and heavily  
limbed. Plan to prune lower/ small limb to increase light through  
lower canopy.

Any assitance appreciated - Thanks ,

Dave Bartram



End of CANUFNET Digest, Vol 59, Issue 2
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