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Doryphores - Colorado Beetle
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Blue Sky



Joined: 30 Jan 2005
Posts: 7654
Location: France
PostPosted: Mon Jun 12, 06 6:05 am    Post subject:  Reply with quote    

Whoops, sorry

It's not like me to forget.

S

Millymollymandy



Joined: 23 Sep 2005
Posts: 187
Location: Brittany, France
PostPosted: Mon Jun 12, 06 6:55 am    Post subject: Reply with quote    

Oh god, so it's the spuds themselves they are after! I'll have to start having a delve on the ground then. Thanks Simon.

Blue Sky



Joined: 30 Jan 2005
Posts: 7654
Location: France
PostPosted: Mon Jun 12, 06 10:26 am    Post subject: Reply with quote    

Mandy, no. Don't start digging

I have not made it very clear (as usual ) sorry.

The beetles will lay there eggs and the larvae will burrow into the soil awaiting next years crop of spuds which is why crop rotation is important.

By picking the beetles off the spuds now you will discourage them from laying eggs in the first place (i.e. squish them). The larvae overwinter in the soil to emerge next spring. AFAIK you will probably not get many eggs until well into the season but the more you can pick off the better for your spuds.

We got hundreds of them last year but we also still got hundreds of spuds so don't panick. It was never my intention to turn this into a "bird flu" type scare. Just to point out to folk on the continent that observation is advisable.

Millymollymandy



Joined: 23 Sep 2005
Posts: 187
Location: Brittany, France
PostPosted: Mon Jun 12, 06 10:55 am    Post subject: Reply with quote    

*heaves sigh of relief* Thanks for the further info. Actually I wasn't going to start digging them up but have a look at the ground under the spuds for beetles!

This is one of the times where I was being lazy and instead of googling information of the beetle I have just asked the question here.

That photo of the larvae that you sent me - it might be a good idea to post it here for anyone reading this thread. I knew what the beetles looked like - they do stand out like sore thumbs - but I had no idea what the larvae looked like. Luckily they should be easy(ish) to spot too, given the colouring.

Blue Sky



Joined: 30 Jan 2005
Posts: 7654
Location: France
PostPosted: Mon Jun 12, 06 11:33 am    Post subject: Reply with quote    

Here it is .....

zigspider



Joined: 08 Sep 2006
Posts: 3
Location: Cape Breton Island, Canada
PostPosted: Sat Sep 09, 06 2:04 am    Post subject: Reply with quote    

Hi there,

new to this forum, but fresh from France (Centre)

I used the tried and tested pick them off and drop in salt water. Means a bit of work on a daily basis, but does deal with them.

Agree with the rotation. No way you can get all of them before they lay eggs etc..


Still, did get plenty of potatoes anyway.

Now living in Canada, so hopefully there will be no problems with the critters.

Jerry

Blue Sky



Joined: 30 Jan 2005
Posts: 7654
Location: France
PostPosted: Sat Sep 09, 06 10:03 am    Post subject: Reply with quote    

Hi Jerry

WELCOME TO DOWNSIZER!

Well done with the picking off routine. I'm afraid I get way too bored with such activities - isn't that what children are here for

Fortunately we did not get too many Doryphores on our plot this year. I took all the tops off my maincrop plants yesterday and found a few larvae and even less beetles but the spuds themselves look wonderful (even the red ones).

Hope you settle in Canada OK. I am told that most of the country is "French speaking" now?

Enjoy the forum.

Simon

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