[NatureNS] Alder killing Larva

From: Christopher Majka <c.majka@ns.sympatico.ca>
To: naturens@chebucto.ns.ca
Date: Thu, 9 Aug 2012 23:53:31 -0300
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Hi Rob,

On 9-Aug-12, at 9:12 PM, Rob Woods wrote:

> The small black larva that are killing the alder leaves this summer.  
> Do they become something else in a later stage and do they attack  
> anything else beside alders as for the most part only my alders are  
> being attacked.

Yes, all larvae metamorphose into an adult form. Most commonly these  
are beetles, flies, wasps, or moths.

In this case the larvae are that of Altica ambiens, the so-called  
alder flea-beetle. Photographs of larvae and adults:

	http://bugguide.net/node/view/643809/bgimage
	http://arbtalk.co.uk/forum/tree-health-care/3374-alder-flea-beetle.html
	http://bugguide.net/node/view/652891/bgimage

This species feeds exclusively on alder, but there are a large number  
of other beetles in the genus Altica that are found on other host  
plants. They can significantly defoliate alder, but very seldom to the  
point of killing them.

Best wishes!

Chris


Christopher Majka  <c.majka@ns.sympatico.ca> | Halifax, Nova Scotia,  
Canada

* Research Associate: Nova Scotia Museum | http://museum.gov.ns.ca/mnh/research-asfr.htm
* Review Editor: The Coleopterists Bulletin | http://www.coleopsoc.org/
* Subject Editor: ZooKeys | http://pensoftonline.net/zookeys/index.php/journal/index
* Review Editor: Zootaxa | http://www.mapress.com/zootaxa/taxa/Coleoptera.html
* Associate Editor: Journal of the Acadian Entomological Society | http://www.acadianes.org/journal.html
* Editor: Atlantic Canada Coleoptera | http://www.chebucto.ns.ca/Environment/NHR/PDF/index.html
* Editor: Bugguide, Coleoptera http://bugguide.net

Whenever I hear of the capture of rare beetles, I feel like an old war- 
horse at the sound of a trumpet. - Charles Darwin


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi Rob,<div><br><div><div>On =
9-Aug-12, at 9:12 PM, Rob Woods wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div><div =
style=3D"color:; background-color:; font-family:times new roman, new =
york, times, serif;font-size:12pt"><div><span>The small black larva that =
are killing the alder leaves this summer. Do they become something else =
in a later stage and do they attack anything else beside alders as for =
the most part only my alders are being =
attacked.</span></div></div></div></blockquote><br></div><div>Yes, all =
larvae metamorphose into an adult form. Most commonly these are beetles, =
flies, wasps, or moths.</div><div><br></div><div>In this case the larvae =
are that of <i>Altica ambiens</i>, the so-called alder flea-beetle. =
Photographs of larvae and adults:</div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	<a =
href=3D"http://bugguide.net/node/view/643809/bgimage">http://bugguide.net/=
node/view/643809/bgimage</a></span></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	<a =
href=3D"http://arbtalk.co.uk/forum/tree-health-care/3374-alder-flea-beetle=
.html">http://arbtalk.co.uk/forum/tree-health-care/3374-alder-flea-beetle.=
html</a></span></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	<a =
href=3D"http://bugguide.net/node/view/652891/bgimage">http://bugguide.net/=
node/view/652891/bgimage</a></span></div><div><br></div>This species =
feeds exclusively on alder, but there are a large number of other =
beetles in the genus <i>Altica</i> that are found on other host plants. =
They can significantly defoliate alder, but very seldom to the point of =
killing them.</div><div><br></div><div>Best =
wishes!</div><div><br></div><div>Chris</div><br><br><div =
apple-content-edited=3D"true"> <span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
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