next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects
Database: 3972/7708 - Relea
This is a multi-part message in MIME format.
------=_NextPart_000_003E_01CF8F0F.65BA8E00
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Thanks Dave, Andrew Hebda has replied direct to me as he cannot access =
the photos. You and he are in agreement that the insects which created =
the etchings were not the cause of death. In looking at the remaining =
trees I would say that my small stand will be gone in the next 2 or 3 =
years. The only trees that are not yet affected are a dozen or so on the =
neighbouring property that are farthest from the starting point.
Kevin
From: David & Alison Webster=20
Sent: Monday, June 23, 2014 5:31 PM
To: naturens@chebucto.ns.ca=20
Subject: Re: [NatureNS] Aspen die off
Hello,
I have not noticed any responses to this question so will take a =
crack at it. From the expression of symptoms; a slow transmission from =
affected trees to nearby healthy trees one can rule out=20
1) insects; they surely would advance more rapidly:=20
2) most forms of canker (based on my limited experience there is one =
that can infect & kill all Poplar in a 1/4 acre patch within one growing =
season and another that causes a very gradual girdling of scattered =
trees over a decade or more.) or other fungal diseases that spread by =
means of spores.
Just as a pure guess, having perhaps eliminated the above, it sounds =
like a bacterial or fungal infection that spreads by root grafting and =
plugs the xylem.
Yt, Dave Webster, Kentville
=20
----- Original Message -----=20
From: klantz@ns.sympatico.ca=20
To: naturens@chebucto.ns.ca=20
Sent: Sunday, June 22, 2014 10:46 PM
Subject: [NatureNS] Aspen die off
Several years ago a few of the Aspen trees on my property died =
followed by a few more the next spring. This year several more close to =
the earlier affected trees have started to put out leaves but appear to =
be dying. Half the stand is now gone as the die-off advances through =
them several trees at a time. As the bark falls away from the affected =
trees I can see tracks left in the sapwood by some sort of borer. This =
could be something that moved in after the trees died but is more likely =
the source of the problem.=20
I have linked some photos showing the tracks left behind in the =
surface wood of the dead trees. Any ideas on what is causing this.=20
https://www.dropbox.com/s/sq6n4z2mk37noh8/IMG_2419.jpg
https://www.dropbox.com/s/w3esnuaptbyfpy3/IMG_2418.jpg
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4592 / Virus Database: 3972/7708 - Release Date: =
06/19/14
------=_NextPart_000_003E_01CF8F0F.65BA8E00
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<HTML><HEAD>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23588">
<STYLE></STYLE>
</HEAD>
<BODY dir=3Dltr bgColor=3D#ffffff>
<DIV dir=3Dltr>
<DIV style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Arial'; COLOR: #000000">
<DIV>Thanks Dave, Andrew Hebda has replied direct to me as he cannot =
access the=20
photos. You and he are in agreement that the insects which created the =
etchings=20
were not the cause of death. In looking at the remaining trees I would =
say that=20
my small stand will be gone in the next 2 or 3 years. The only trees =
that are=20
not yet affected are a dozen or so on the neighbouring property that are =
farthest from the starting point.</DIV>
<DIV> </DIV>
<DIV>Kevin</DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV style=3D"FONT: 10pt tahoma">
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A =
title=3Ddwebster@glinx.com=20
href=3D"mailto:dwebster@glinx.com">David & Alison Webster</A> </DIV>
<DIV><B>Sent:</B> Monday, June 23, 2014 5:31 PM</DIV>
<DIV><B>To:</B> <A title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> =
</DIV>
<DIV><B>Subject:</B> Re: [NatureNS] Aspen die off</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV>Hello,</DIV>
<DIV> I have not noticed any responses to this =
question so=20
will take a crack at it. From the expression of symptoms; a slow =
transmission=20
from affected trees to nearby healthy trees one can rule out </DIV>
<DIV> </DIV>
<DIV>1) insects; they surely would advance more rapidly: </DIV>
<DIV> </DIV>
<DIV>2) most forms of canker (based on my limited experience there is =
one that=20
can infect & kill all Poplar in a 1/4 acre patch within one growing =
season=20
and another that causes a very gradual girdling of scattered trees over =
a decade=20
or more.) or other fungal diseases that spread by means of spores.</DIV>
<DIV> </DIV>
<DIV> Just as a pure guess, having perhaps eliminated =
the=20
above, it sounds like a bacterial or fungal infection that spreads by =
root=20
grafting and plugs the xylem.</DIV>
<DIV> </DIV>
<DIV>Yt, Dave Webster, Kentville</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px =
solid; PADDING-RIGHT: 0px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dklantz@ns.sympatico.ca=20
href=3D"mailto:klantz@ns.sympatico.ca">klantz@ns.sympatico.ca</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, June 22, 2014 =
10:46=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [NatureNS] Aspen die =
off</DIV>
<DIV> </DIV>
<DIV dir=3Dltr>
<DIV style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Arial'; COLOR: #000000">
<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><FONT=20
face=3D"Times New Roman"><FONT style=3D"FONT-SIZE: 12pt">Several years =
ago a few=20
of the Aspen trees on my property died followed by a few more the next =
spring.=20
This year several more close to the earlier affected trees have =
started to put=20
out leaves but appear to be dying. Half the stand is now gone as the =
die-off=20
advances through them several trees at a time. As the bark falls away =
from the=20
affected trees I can see tracks left in the sapwood by some sort of =
borer.=20
This could be something that moved in after the trees died but is more =
likely=20
the source of the problem. </FONT></FONT></P>
<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><FONT=20
face=3D"Times New Roman"><FONT style=3D"FONT-SIZE: 12pt">I have linked =
some photos=20
showing the tracks left behind in the surface wood of the dead trees. =
Any=20
ideas on what is causing this. </FONT></FONT></P>
<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><FONT=20
face=3D"Times New Roman"><FONT style=3D"FONT-SIZE: =
12pt"></FONT></FONT> </P>
<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><FONT=20
face=3D"Times New Roman"><FONT=20
style=3D"FONT-SIZE: =
12pt">https://www.dropbox.com/s/sq6n4z2mk37noh8/IMG_2419.jpg</FONT></FONT=
></P>
<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><FONT=20
face=3D"Times New Roman"><FONT=20
style=3D"FONT-SIZE: 12pt"></FONT></FONT> </P><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: 'Times New Roman'; =
mso-ansi-language: en-ca; mso-fareast-language: en-us; =
mso-bidi-language: ar-sa"><FONT=20
face=3D"Times New Roman"><FONT=20
style=3D"FONT-SIZE: =
12pt">https://www.dropbox.com/s/w3esnuaptbyfpy3/IMG_2418.jpg</FONT></FONT=
></SPAN></DIV></DIV><A></A>
<P align=3Dleft avgcert?? color=3D"#000000">No virus found in this=20
message.<BR>Checked by AVG - <A=20
href=3D"http://www.avg.com">www.avg.com</A><BR>Version: 2014.0.4592 / =
Virus=20
Database: 3972/7708 - Release Date:=20
06/19/14</P></BLOCKQUOTE></DIV></DIV></DIV></BODY></HTML>
------=_NextPart_000_003E_01CF8F0F.65BA8E00--
next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects