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Yelly grub with redish head


 
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galwaybeginner
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PostPosted: Tue May 26, 2009 3:18 pm    Post subject: Yelly grub with redish head Reply with quote

I didn't get a chance to take a photo, but maybe someone will recognise this from the description...Question

I've found a couple of grubs (think that's the right word - like worms crossed with caterpillars without legs!). Like maggots actually.

Anyway, found a few of these in my soil, about 4 inches down. Strong yellow - close to the yellow of the emoticons. About 2cm long...and not very fat.

I've no idea what they are, and was wondering if anyone would have any idea from my (pretty crap) description. Just wondering if I need ot do anything about them or are they 'good' for the soil.

Thanks
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medieval knievel
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PostPosted: Tue May 26, 2009 3:39 pm    Post subject: Reply with quote

almost certainly vine weevil grubs.

http://en.wikipedia.org/wiki/Black_vine_weevil
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galwaybeginner
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PostPosted: Tue May 26, 2009 3:46 pm    Post subject: Reply with quote

That's what I was thinking, but they looked yellower, and slightly slimmer. Thanks for confirming my fear.

Presuming that's what they are, would a biocontrol be the only organic way of treating the soil? Heard bad things about the old vine weevil so would rather not fail before I've even planted my first veg!
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medieval knievel
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PostPosted: Tue May 26, 2009 3:53 pm    Post subject: Reply with quote

previous thread on it here:

http://www.gardenplansireland.com/forum/about496.html
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galwaybeginner
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PostPosted: Tue May 26, 2009 4:12 pm    Post subject: Reply with quote

Cool, thanks. I think I'll go with - http://www.mrmiddleton.com/shop/product.php?productid=1&cat=1&page=2

I want to try to stay organic.
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Sean Ph'lib
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PostPosted: Tue May 26, 2009 9:20 pm    Post subject: Reply with quote

Actually, they sound more like wireworms to me.
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galwaybeginner
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PostPosted: Tue May 26, 2009 11:10 pm    Post subject: Reply with quote

That's it!

It looks like this: http://whatcom.wsu.edu/ag/homehort/pest/images/wireworm.jpg

So must be wireworm. Any simple remedy? Actually, any remedy at all?! Shocked
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verge
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PostPosted: Tue May 26, 2009 11:43 pm    Post subject: Reply with quote

galwaybeginner wrote:
That's it!

It looks like this: http://whatcom.wsu.edu/ag/homehort/pest/images/wireworm.jpg

So must be wireworm. Any simple remedy? Actually, any remedy at all?! Shocked


Potato traps are one option galwaybeginner. See here Potato traps for wireworm.

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Sean Ph'lib
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PostPosted: Tue May 26, 2009 11:47 pm    Post subject: Reply with quote

They're usually a pest in newly dug grassland. As you increase the organic content of the soil (with compost, manure, leaf-mould etc.) they'll eventually disappear. On a small scale, you can control them (to some extent) by burying pieces of carrot, turnip, potato etc. about six inches deep, marking the spot, and d igging them up every day or two. The wireworms will have burrowed into the bait and you can then destroy them. That's the theory - I've never tried it, but it might work! The chemical way is by using something called bromorphos (I think) ; I can't tell you much about it since I don't use any chemicals.
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galwaybeginner
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PostPosted: Wed May 27, 2009 10:35 am    Post subject: Reply with quote

Thanks Sean. I don;t want ot use chemicals either - have put quite a bit of work and research into making my veg plot as organic as possible.

I read about this http://www.nemo.ie/about.htm

Says it works for wireworm. DO you think it is still organic? Seems in the grey area to me!
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Liparis
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PostPosted: Wed May 27, 2009 11:00 am    Post subject: Reply with quote

You got there with that link before me, galwaybeginner. I have the information on that as well. Yes. it's biological and targets all sorts, including most species of weevel, leatherjackets, caterpillar, wireworms and loads more. They are Nemotodes. Harmless to worms, bees and bumble bees etc.
It's worth checking out, and it's Irish. Around €20 for enough to do about 40 - 60 sqr mtr.
Bill.

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galwaybeginner
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PostPosted: Wed May 27, 2009 1:16 pm    Post subject: Reply with quote

Yeah, seems a good price, and great to see these things being made in Ireland for a change.

Thanks all for the info and advice.
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michael brenock
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PostPosted: Wed May 27, 2009 4:19 pm    Post subject: Reply with quote

Sean is on the ball here. it is almost certain that they are wireworms and these are most common out of freshly dug grassland and will hardly be there next year. the parent is the click beetle and eggs are laid in the autumn and grubs hatch out in spring. the grubs like a diet of potatoes or carrots at a depth of 3-4 inches and take them up for checking every few days. They are opportunists and will attack any crop nearby.
michael brenock horticultural advisor (retired)
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