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  1. 8th January 2013, 08:31 AM #1
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    eisbaer
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    Default Borer holes in cypress

    Hi everyone,

    I discovered these holes two days ago. This timber was fine only a month ago so it's very recent. The wood is Cypress pine and was felled a good few years ago and is well seasoned. Visual inspection of nearby timbers doesn't show any damage. The holes are about 4mm across.

    What I'm keen to find out is what kind of borer it is. I haven't seen an actual insect yet, and I've injected kerosene into the holes so I'm unlikely to see one. There were what appeared to be granular material in some of the holes, but I'm not sure if it was eggs or frass.

    Any advice is much appreciated.



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  3. 8th January 2013, 09:23 AM #2
    shedbound
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    The hole looks to be too big for lictus borer, looks like a grub hole, from what I can see in the pics?
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  4. 8th January 2013, 12:10 PM #3
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    Default Re: Borer holes in cypress

    Yeah I'm sure it's not lychtid. There are some beetles that apparently cause this sort of damage but I don't know enough about them.

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  5. 10th January 2013, 10:22 PM #4
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    Default Re: Borer holes in cypress

    According to most reading online this is likely to be a jewel beetle.

    They can apparently live in the timber for years before emergence so it's possible they were already there. Problem now is that the beetles will have flown out into my workshop filled with timber and may have laid eggs anywhere. Looks like I'm going to have to try a preventative borer treatment on the more susceptible timbers. I've bought some of the rentokil borer treatment for this.

    If anyone has anything to add or another opinion please feel free. Hopefully this information proves correct and therefore useful to someone else.
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  6. 13th January 2013, 08:37 PM #5
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    Default Re: Borer holes in cypress

    As suspected, it appears to have been jewel beetle. Found this one not 1 metre from where the affected timber was.



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  7. 16th January 2013, 07:01 PM #6
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    Cypress pine from say Injune Roma area? How do you get a piece that big without a knot?

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  8. 16th January 2013, 08:27 PM #7
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    Default Re: Borer holes in cypress

    I'm actually not sure exactly where it was cut from. I've made a coffee table out of another piece from the same pile and it had a few big knots.

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