 IAS on Facebook
 IAS on Instagram
|
IAS Aroid Quasi Forum
About Aroid-L
This is a continuously updated archive of the Aroid-L mailing list in a forum format - not an actual Forum. If you want to post, you will still need to register for the Aroid-L mailing list and send your postings by e-mail for moderation in the normal way.
|
leaf beetles on aroids
|
From: pjm at gol.com (Peter Matthews) on 2008.05.20 at 01:12:45(17588)
Dear Aroiders,
I am currently in the Philippines (Luzon) looking around for wild taros.
Something I have noticed here is the presence of a large beetle
(irridescent green back, bright orange head) frequently feeding on the
leaves of Colocasia esculenta and very rarely on the naturalised
populations of Xanthosoma sagittifolium, and not at all on the native
Homolomena philippinensis. Nor on bananas or other obvious garden plants.
The beetle is large, about 1.5 - 2 cm long, and cuts a circular line on
the leaf of taro before eating out the central portion, leaving an often
near-perfect circular hole in the leaf. The damage itself is quite
beautiful.
| +More |
Has anyone else seen such beetles on aroids, in the wild or in
cultivation, in the Philippines or in other countries?
I have sme nice photos, but cannot post them until I get back to Japan.
Peter Matthews (Manila, in transit)
|
|
From: crogers at ecoanalysts.com (Christopher Rogers) on 2008.05.20 at 23:15:41(17594)
Hiyer, Peter!
I would very much like to see you pictures. You called them leaf beetles. Do
you mean that you think they are chrysomelids?
Happy days,
Christopher
| +More | |
D. Christopher Rogers
Senior Invertebrate Ecologist/ Taxonomist
((,///////////=======<
EcoAnalysts, Inc.
1.530.756.4481
1.530. 383.4798 (cell)
1307 "L" Street
Davis, CA 95616
USA
?Invertebrate Taxonomy
?Endangered Species
?Ecological Studies
?Bioassessment
?Invasive Species
?Plankton
?Phycology
Moscow, Idaho ? Bozeman, Montana ? Woodland, California ? Joplin, Missouri
Selinsgrove, Pennsylvania
ecoanalysts.com
-----Original Message-----
From: aroid-l-bounces at gizmoworks.com [mailto:aroid-l-bounces at gizmoworks.com]
On Behalf Of Peter Matthews
Sent: Monday, May 19, 2008 6:13 PM
To: Discussion of aroids
Subject: [Aroid-l] leaf beetles on aroids
Dear Aroiders,
I am currently in the Philippines (Luzon) looking around for wild taros.
Something I have noticed here is the presence of a large beetle
(irridescent green back, bright orange head) frequently feeding on the
leaves of Colocasia esculenta and very rarely on the naturalised
populations of Xanthosoma sagittifolium, and not at all on the native
Homolomena philippinensis. Nor on bananas or other obvious garden plants.
The beetle is large, about 1.5 - 2 cm long, and cuts a circular line on
the leaf of taro before eating out the central portion, leaving an often
near-perfect circular hole in the leaf. The damage itself is quite
beautiful.
Has anyone else seen such beetles on aroids, in the wild or in
cultivation, in the Philippines or in other countries?
I have sme nice photos, but cannot post them until I get back to Japan.
Peter Matthews (Manila, in transit)
_______________________________________________
Aroid-L mailing list
Aroid-L at www.gizmoworks.com
http://www.gizmoworks.com/mailman/listinfo/aroid-l
No virus found in this incoming message.
Checked by AVG.
Version: 7.5.524 / Virus Database: 269.23.21/1456 - Release Date: 5/20/2008
6:45 AM
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.524 / Virus Database: 269.23.21/1456 - Release Date: 5/20/2008
6:45 AM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.gizmoworks.com/mailman/private/aroid-l/attachments/20080520/c4766e68/attachment-0001.htm
|
|
From: botanist at malesiana.com (Peter Boyce) on 2008.05.21 at 07:16:44(17597)
Dear Peter,
These sound to be chrysomelid beetles; they are a common leaf predator (also
inflorescence predator or possibly pollinator) here in Sarawak. Ther
particularly seem to go for Alocasia, Colocasia and Schismatoglottis and
much less often Homalomena (maybe because of the resins) and climbers
(possibly because of the sclereids).
Chris Darling has done some excellent reserach into them.
See attached images from here.
Very best
Peter
| +More |
----- Original Message -----
From: "Peter Matthews"
To: "Discussion of aroids"
Sent: Tuesday, May 20, 2008 9:12 AM
Subject: [Aroid-l] leaf beetles on aroids
> Dear Aroiders,
>
> I am currently in the Philippines (Luzon) looking around for wild taros.
>
> Something I have noticed here is the presence of a large beetle
> (irridescent green back, bright orange head) frequently feeding on the
> leaves of Colocasia esculenta and very rarely on the naturalised
> populations of Xanthosoma sagittifolium, and not at all on the native
> Homolomena philippinensis. Nor on bananas or other obvious garden plants.
>
> The beetle is large, about 1.5 - 2 cm long, and cuts a circular line on
> the leaf of taro before eating out the central portion, leaving an often
> near-perfect circular hole in the leaf. The damage itself is quite
> beautiful.
>
> Has anyone else seen such beetles on aroids, in the wild or in
> cultivation, in the Philippines or in other countries?
>
> I have sme nice photos, but cannot post them until I get back to Japan.
>
> Peter Matthews (Manila, in transit)
>
>
> _______________________________________________
> Aroid-L mailing list
> Aroid-L at www.gizmoworks.com
> http://www.gizmoworks.com/mailman/listinfo/aroid-l
-------------- next part --------------
A non-text attachment was scrubbed...
Name: scabriuscula (AL-64) (Small).jpg
Type: application/octet-stream
Size: 76393 bytes
Desc: not available
Url : http://www.gizmoworks.com/mailman/private/aroid-l/attachments/20080521/62618e9a/attachment-0002.dll
-------------- next part --------------
A non-text attachment was scrubbed...
Name: niahensis c.f. [AR-2071] (57) (Small).jpg
Type: application/octet-stream
Size: 21099 bytes
Desc: not available
Url : http://www.gizmoworks.com/mailman/private/aroid-l/attachments/20080521/62618e9a/attachment-0003.dll
|
|
From: eugene_hoh at yahoo.com.au (Eugene Hoh) on 2008.05.21 at 21:11:30(17600)
hi Peter, Christopher & all,
At the International Aroid Symposium in Kuching back
in 2004 (as some of us on aroid-L will remember)
there were some very interesting presentations on
animal-plant interactions - and one of these was,
indeed, a paper on beetles cutting circular holes in
aroids, by entomologist Christopher Darling.
Apparently these cuts allow latex (unpalatable to
beetles?) to drain from the encircled areas, which are
subsequently eaten. Darling's study was conducted in
Vietnam - but during the symposium field trip he
pointed out similar holes occurring in some local
aroids (eg. Alocasia sp. - A. scabriuscula??) which we
saw growing near roadsides and streams. All the holes
seemed to be about the same size.
Here's a link I've found, to a published paper:
http://www.eeb.utoronto.ca/system/files/2007_Darling+_Holey_aroids_Biotropica.pdf
In case the link doesn't work, the reference is:
Biotropica 39(4), 555-558, 2007; and the species
studied were the beetle Aplosonyx ancora
(Chrysomelidae), Alocasia navicularis and Colocasia
gigantea.
The paper also mentions that the Philippines is within
the range of the genus Aplosonyx, and all the recorded
host plants of the genus are aroids (C. esculenta is
one).
Hope this is useful.
cheers
Eugene
| +More |
--- Christopher Rogers
wrote:
> Hiyer, Peter!
>
>
>
> I would very much like to see you pictures. You
> called them leaf beetles. Do
> you mean that you think they are chrysomelids?
>
>
>
> Happy days,
>
> Christopher
>
>
>
>
>
> D. Christopher Rogers
>
> Senior Invertebrate Ecologist/ Taxonomist
>
> ((,///////////=======<
>
>
>
> EcoAnalysts, Inc.
>
> 1.530.756.4481
>
> 1.530. 383.4798 (cell)
>
> 1307 "L" Street
>
> Davis, CA 95616
>
> USA
>
>
>
> ?Invertebrate Taxonomy
>
> ?Endangered Species
>
> ?Ecological Studies
>
> ?Bioassessment
>
> ?Invasive Species
>
> ?Plankton
>
> ?Phycology
>
>
>
> Moscow, Idaho ? Bozeman, Montana ? Woodland,
> California ? Joplin, Missouri
>
> Selinsgrove, Pennsylvania
>
> ecoanalysts.com
>
> -----Original Message-----
> From: aroid-l-bounces at gizmoworks.com
> [mailto:aroid-l-bounces at gizmoworks.com]
> On Behalf Of Peter Matthews
> Sent: Monday, May 19, 2008 6:13 PM
> To: Discussion of aroids
> Subject: [Aroid-l] leaf beetles on aroids
>
>
>
> Dear Aroiders,
>
>
>
> I am currently in the Philippines (Luzon) looking
> around for wild taros.
>
>
>
> Something I have noticed here is the presence of a
> large beetle
>
> (irridescent green back, bright orange head)
> frequently feeding on the
>
> leaves of Colocasia esculenta and very rarely on the
> naturalised
>
> populations of Xanthosoma sagittifolium, and not at
> all on the native
>
> Homolomena philippinensis. Nor on bananas or other
> obvious garden plants.
>
>
>
> The beetle is large, about 1.5 - 2 cm long, and cuts
> a circular line on
>
> the leaf of taro before eating out the central
> portion, leaving an often
>
> near-perfect circular hole in the leaf. The damage
> itself is quite
>
> beautiful.
>
>
>
> Has anyone else seen such beetles on aroids, in the
> wild or in
>
> cultivation, in the Philippines or in other
> countries?
>
>
>
> I have sme nice photos, but cannot post them until I
> get back to Japan.
>
>
>
> Peter Matthews (Manila, in transit)
>
>
>
Get the name you always wanted with the new y7mail email address.
www.yahoo7.com.au/mail
|
| |
Note: this is a very old post, so no reply function is available.
|
|
