<br><font size=2 face="sans-serif">We completely eliminated Schubert chokecherry
from our planting list. We found that the disease, which had once
been relatively manageable, got worse over the years (for some reason)
and we couldn't keep up with pruning. We started a species replacement
program and continue to remove and replace trees as warranted. It's
odd because for years I observed trees loaded with black knot that continued
to blossom and stay very green, but in the last few years they have finally
started to succumb and die. </font>
<br>
<br><font size=2 face="sans-serif">Shelley Vescio RPF</font>
<br><font size=2 face="sans-serif">City of Thunder Bay</font>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Trevor Thistle <Trevor.Thistle@edmonton.ca></b>
</font>
<br><font size=1 face="sans-serif">Sent by: canufnet-bounces@list.web.net</font>
<p><font size=1 face="sans-serif">10/02/2010 03:41 PM</font>
<table border>
<tr valign=top>
<td bgcolor=white>
<div align=center><font size=1 face="sans-serif">Please respond to<br>
Canadian Urban Forest Network <canufnet@list.web.net></font></div></table>
<br>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"'canufnet@list.web.net'"
<canufnet@list.web.net></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">Kim Bendle <Kim.Bendle@edmonton.ca>,
Costigan <Doug.Costigan@edmonton.ca>, Marshall Mithrush <Marshall.Mithrush@edmonton.ca>,
Travis Kennedy <Travis.Kennedy@edmonton.ca>, Rogers <Megan.Rogers@edmonton.ca>,
Prutton <Norm.Prutton@edmonton.ca>, Megan, Dan Chouinard <Dan.Chouinard@edmonton.ca>,
Mark Wartenbe <Mark.Wartenbe@edmonton.ca>, Bonnie Fermanuik <Bonnie.Fermanuik@edmonton.ca>,
Norm, Suzana Bodnar <Suzana.Bodnar@edmonton.ca>, Doug, John Helder
<John.Helder@edmonton.ca>, Bev Minsky <Bev.Minsky@edmonton.ca>,
Guy Nighbor <Guy.Nighbor@edmonton.ca></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[CANUFNET] Black knot problems in Edmonton</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=3 face="Times New Roman">To Whom It May Concern:</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">For the past few years the City
of Edmonton has been experiencing an outbreak of black knot (<i>Apiosporina
morbosa</i>). Edmonton’s urban forestry unit, River Valley Forestry and
Environmental Services (RVFES) has been responding by pruning out the visible
fruiting bodies, and by removing trees that are beyond saving. However,
if we continue these practices we will eventually end up removing thousands
of our valuable ornamental trees of the genus <i>Prunus</i>. So, we are
asking other municipalities about their experience with this fungal pathogen
and what steps they have taken to battle black knot. RVFES would greatly
appreciate if you could aid us in our fight against black knot by taking
the time to answer the following questions.</font>
<br><font size=3 face="Times New Roman"> </font>
<ul>
<li><font size=3 face="Times New Roman">Does your region have problems
with black knot? If so do you have a campaign or strategy for combating
it? If yes, how do you communicate your strategy to the public, and what
do you do to encourage citizens to take care of black knot on their own
trees?</font>
<li><font size=3 face="Times New Roman">If your municipality does treat
for black knot, what treatments were and were not successful?</font>
<li><font size=3 face="Times New Roman">How serious is black knot mortality
in your municipality?</font>
<li><font size=3 face="Times New Roman">Aside from Amur cherry, do you
know of any black knot resistant varieties? Have you had success with any
of these varieties?</font>
<li><font size=3 face="Times New Roman">How does your municipality dispose
of infected material?</font>
<li><font size=3 face="Times New Roman">Has your municipality tried or
had any success with the biological control agent, <i>Trichothecium roseum</i>
(fungal parasite)?</font></ul><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">Thank you for you time, </font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">Trevor Thistle </font><font size=1 face="Times New Roman">B.Sc.
(Forestry)</font>
<br><font size=3 face="Times New Roman">Urban Forester & ISA Certified
Arborist</font>
<br><font size=3 face="Times New Roman">The City of Edmonton, Asset Management
and Public Works</font>
<br><font size=3 face="Times New Roman">River Valley Forestry and Environmental
Services</font>
<br><font size=3 face="Times New Roman">Email: trevor.thistle@edmonton.ca</font>
<br><font size=3 face="Times New Roman">Ph: (780) 944-7833</font>
<br><font size=3 face="Times New Roman">Fax: (780) 496-4978</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Arial"> </font>
<br>
The information transmitted by electronic communication is intended
only for
the person or entity to which it is addressed and may contain
confidential
and/or privileged material. The sender does not waive any related
rights or
obligations. Any review, re-transmission, dissemination or other
use of, or
taking of any action in reliance upon this information, by persons
or entities
other than the intended recipient, is prohibited. If you received
this in
error, please contact the sender and delete the material from any
computer