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Thread: Grubs in Blackwood slabs?
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5th June 2020, 12:42 AM #1Novice
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Grubs in Blackwood slabs?
Hello I recently sold some green Blackwood slabs and the purchaser is not happy with. They contained what looks like to me, witchetty grubs under the bark and into the sap wood. I noticed some of this when I was milling but didn’t think anything of it as I just thought they would die and is normal in older trees. I have attached some photos. Note the first cut boards I chucked in free aswell. About 4 of them. Also I have been told they were cheap in the first place. I’m just looking at advice on how I should go about it ?
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5th June 2020, 01:07 AM #2
The only issue with the grubs is that, while the timber is green, the grubs can keep burrowing into the heartwood.
If you are going to fell and mill Blackwood then you need to debark it immediately on felling otherwise it attracts these guys...
If you don't mind the grubs...they can be fried off successfully and tastefully on chilli flavoured oil...Ours is not to reason why.....only to point and giggle.
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5th June 2020, 07:50 AM #3Novice
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So even though the timber is slabbed and de barked the bugs will still live on now?
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5th June 2020, 01:08 PM #4GOLD MEMBER
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The Bardi grub is long lived (years.) The moth (Rain moth) only lives for one day as it does not have the ability to eat. The grubs live underground and attack trees from the roots and work their way up. while ever there is cellulose in the wood they will survive. Once the timber has seasoned cellulose is no longer available. The best method of handling Acacias is to treat with an insecticide at milling and kiln dry to speed up the seasoning process.
Interestingly, the grubs are worth more than the timber. A small jar of pickled grubs fetches about $45. This may or may not be of interest to your client.
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5th June 2020, 11:57 PM #5
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7th June 2020, 09:03 PM #6Senior Member
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I cut a lot of Sally wattle and have the same issue. As the others said de-bark Asap. I also treat all my slabs with Borax. You can buy a small tub from woolies in the laundry detergent section. I put a lidfull of Borax to a watercan of boiling water. Flood the slabs with this mix. This will stop any new attacks on the wood.
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10th June 2020, 12:00 AM #7Novice
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Just an update on this guys. The slabs I cut was from a tree I cut down 12 months ago. I am planning to cut a few more slabs in the future and I am wondering what to do with all the little logs 300-400 wide that I won’t get around to milling for maybe 12 months. And I won’t be able to debark it. Can I stack them up and spray them with something with the bark on?
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10th June 2020, 10:05 AM #8Ours is not to reason why.....only to point and giggle.
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