Cameraria ohridella

[David Humphries]

Just spent a couple of weeks up in Yorkshire, Tyneside and Cleveland well away from the epicentre of this 'orrible little pest.

It was very refreshing to come across Aesculi either in stands or growing solitary seemingly unaffected.

 

 

Was wondering how far either Southwest or North has Cameraria actually spread so far?

 

What is your experience of it and where are you?

 

Guess Alice Holt would tell me if I asked, but I'm more interested in the Hands on Nationwide Arb interaction stuff.

 

 

David

 

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[David Humphries]

They're Back

 

The last shot I have no idea what it is; looks like the Leaf Minor on Steroids

 

Just in case anyone was wondering, which I seriously doubt (totaly wrong Forum)

 

I've finaly tracked down the name of the moth mentioned above.

Drum roll please, It's a male.................................................................................................Esperia sulphurella.

 

No need to worry about a new pest invading and threaterning the survival of one of our beloved indegies then. Phew .................................

Apparantly, their grubs like feeding off dead wood.

So I better go create some new Coronetted Monoliths.

 

Enough of my babling, just dont do loose ends.

 

 

Info courtesy of Gerel over at the moth forum on WAB.

[skyhuck]

No need to worry about a new pest invading and threaterning the survival of one of our beloved indegies then.

 

Indigenous?? Horse Chestnut??

[David Humphries]

Indigenous?? Horse Chestnut??

 

Fair point Mr Huck, but you know what I meant

 

Having spent time this year trapping iggly wigglies for the Forest research,

I'm sceptical of any unknown wee beasties I come across.

 

 

 

 

 

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[David Humphries]

Have been informed via the London Tree Officers network of the below pest.

 

Phyllonorycter platani - Leaf Miner of London Plane

 

Similar size to Cameraria.

 

Not aware of it on my patch yet, but will be keeping an eye out.

 

http://ukmoths.org.uk/show.php?id=2331

 

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[perci]

I've got a problem with cameraria. Some advice would be appreciated. I usually install a 'Piège(trap)à phéromone on individual trees, a slow but enviromently friendly way of diminishing the population.

In this case i have 3, 150 year old chesnuts that will be propped,mulched and treated against cameraria...problem....the park is full of horse chesnuts and a mega population of cameraria. The above solution would be totaly inadequate...any ideas?

[Bundle 2]

Not that I can help as such but reading an article in Hortweek by several big wigs in the tree world ( no names,no packdrills ) it really isnt such a big problem.........well now I feel better!

[David Humphries]

I've got a problem with cameraria. Some advice would be appreciated. ...any ideas?

 

 

 

Hello Perci,

 

I generally agree with Bundle here.

HC appear to get enough energy via spring and early summer photosynthesis to not really panick about the infestation.

This is ofcourse unless secondary infections such as Bleeding Canker are present.

 

From my observations, over the last Six years, by itself, Cameraria attack is mainly aesthetic.

 

I was at Kew a few weeks back where I was present at a demo by Peter Boston of Arborjet and Treesunlimited,

on inoculating against pests such as Cameraria with intravenous drips and injections.

I think the insecticide is Abamectin?

Not yet licenced here in the Uk.

http://arborjet.com/

http://www.treesunlimited.co.uk/

 

Alternatively, you could rake up and burn/compost the leaves to rid yourself of any overwintering grubs.

Lot of work, unknown success.

 

Do you know if any of your indigenous predators are geting a taste for Cameraria yet?

Where part of France are you exactly?

 

Good luck in your management.

 

Ftr, only water was used in the demo in these pictures.

[perci]

Yes, aesthetic, it can ruin a beautiful paysage by late july!!! What are the long term effects of HC, veteran, losing most of its leaves by mid august year after year. I was inspecting an old HC today, had very few leaves in august, warmish october,and now it has a spinkling of young leaves and flowers!! In October!!

[David Humphries]

Whilst attending to a couple of Chestnut limb failures this fine autumnal morn,

I spent a nano second or two pondering on what's going on with our erstwhile f®eind.

 

Here's a couple of jolly young Miners, happily trundling their way through the playfields of a poor unsuspecting Chestnut leaf.

 

Locally, it appears to me as if this years infestation is consideranbly (well percievably) less than the recent previous outbreaks. Mmmmmm

 

Something turning it's attention to a new food source perhaps?

 

Or just the Yin & Yang of Cameraria adjusting to the local equalibrium of their new port of call ?

 

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Edited September 16, 2009 by Monkey-D