LumberJocks

Bunya pine work #2: Grants Bunya pine Pt 2

  • Advertise with us
Blog entry by robscastle posted 11-30-2019 09:25 AM 317 reads 0 times favorited 8 comments Add to Favorites Watch
« Part 1: Grant's Bunya Pine part 1 Part 2 of Bunya pine work series Part 3: Grant's Bunya pine Some horrid discoveries have been made »

well I decided to do some more exploratory surgery on the pest riddled off cut to see what has actually been done.

The reason for this was that the end grain I checked seemed to evidence of full penetration damage.

First up to make everything reasonably safe to work I ripped off both live edges

As you can see and as expected the insect damage is still evident.

So I made two more rips one about 25mm wide and a second about 60mm wide.

Here is the 25mm one

And now the 60mm one.

Still not completely satisfied I then split the 60 mm one in half.

Whatever decided to have a picnic in there certainly enjoyed themselves.

In fact the timber could be used for a feature panel on a box, but I think any other use its ruined well and truly.

The rubbish samples went into the Otto bin and I packed up for the day.

-- Regards Rob



8 comments so far

View robscastle's profile

robscastle

6548 posts in 2766 days


#1 posted 11-30-2019 09:34 AM

Here is a reply from Monte!

We called them a Boring Beetle. Kiln drying or any way to get the wood to 150 degrees for a few hours will kill them. I know from experience that if you don’t kill them they come out finished projects and cause you to make harsh comments.

I will follow your blog, looks like fun.

-- Regards Rob

View robscastle's profile

robscastle

6548 posts in 2766 days


#2 posted 11-30-2019 09:38 AM

So I went and researched what they could possibly be:-

Queensland pine beetle

Native to Queensland, the small Queensland pine beetle is a pest of hoop pine timbers.

In Queensland, 4 species of anobiid beetles (Family: Anobiidae) occur in and around buildings. About 200, of around 1,100 species worldwide, are found in Australia.

The Queensland pine beetle and the common furniture beetle, a native of Europe, are economically significant, while the pine bark anobiid and the cigarette beetle aren’t significant.

Improved building practices for timber constructions have reduced the risk of attack and reports of damage.
Scientific name
Calymmaderus incisus

Similar species

Cigarette beetle
Common furniture beetle
Pine bark anobiid


Description

Adult beetles are oval-shaped, about 3mm long, 1.5mm wide and shiny reddish-brown.
Antennae have a 3-segmented club on the end.
Body surfaces are covered in fine hairs and many very small punctures, which are not visible to the eye.
Legs are often folded tightly against the body.
Eggs are white, spherical, 0.4mm in diameter and just visible.
Larvae are soft, covered with many fine hairs, curved, wrinkled, and creamy white with dark-brown jaws.
Fully grown larva measures 4–5mm long and 1.5mm wide.
The pupa is soft, oval, creamy-white and measures 3.0–3.5mm long and 1.5mm wide.


Distribution

Widespread in south-eastern Queensland.
Significant damage has previously only occurred to timbers within the area bounded by Murwillumbah (New South Wales) in the south, Bundaberg in the north and the Great Dividing Range in the west.


Damage

Attacks susceptible hoop pine sapwood but rarely other timbers.
Attacks unsealed (not painted or varnished) susceptible wood in housing and sometimes furniture.
Attacks are most serious in old homes within more densely populated areas.
Re-infests untreated susceptible timber until it is completely honeycombed and has lost its strength.
Attacks hoop pine floors and walls, but rarely roofing timbers.
Typically only attacks some boards or sapwood areas within boards.
Boards can appear strong from the top but be riddled with holes underneath, as adults emerge mainly from the underside of floors.
Larvae reduces susceptible timber to gritty, cigar-shaped pellets.
Causes circular 2mm holes in the timber surface, which may penetrate paint or wall sheeting, caused when mature larvae pupate and adults emerge.
Damage progresses slowly so extensive damage may take many years.
Infestations in very old structures are likely to have died out naturally, as all the susceptible timber was consumed. Painted wallboards often show dimpling but no new holes. This indicates the pest is extinct.


Biology

Live adults are only found from October–February. They live for up to 4 weeks.
Eggs are laid in cracks of susceptible timber and larvae hatch in a few weeks.
Larvae burrow long distances and only the larval stage destroys timber.
Tunnels run with and across the grain, giving a honeycombed appearance.
Tunnels are packed loosely with frass (cigar-shaped pellets of chewed wood when magnified).
Rubbed into the palm of the hand, the frass is fine and gritty, quite different from the frass of the powderpost beetle, Lyctus, which is soft and silky.
Frass can be ejected in small amounts through flight holes.
Before pupating, the larva moves closer to the surface and constructs a pupal chamber.
Larvae usually take 3 years to develop.


Monitoring and action

To prevent damage, which is less costly than treating: limit insect access to the timber using coverings or enclosures paint or polish with varnish or wax treat with a preservative at source.
Relevant prevention must be carried out when constructing a building as required by the Queensland Variation of the Building Code of Australia (BCA) – Qld B1.3 (f) (iv). Consult a professional pest control agency for information about managing a suspected Queensland pine beetle infestation.


-- Regards Rob

View anthm27's profile

anthm27

1545 posts in 1672 days


#3 posted 11-30-2019 09:43 AM

Well done on the exploratory surgery there Rob,
As you said, seems there will be no “Roentgen Berlin cabinets” out of this lot.
seems its going to be a good Bonfire though.
Cheers Anth

-- Hand Skills provide freedom.

View crowie's profile

crowie

3329 posts in 2513 days


#4 posted 11-30-2019 09:50 AM

That’s not good Rob…

If you could be sure the beetles were totally gone, the damage could be a resin filled feature…

-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View robscastle's profile

robscastle

6548 posts in 2766 days


#5 posted 11-30-2019 10:37 AM

I was looking for something and found this!

seems everybodys friend found it too!

-- Regards Rob

View mikeacg's profile

mikeacg

1211 posts in 1619 days


#6 posted 11-30-2019 11:50 AM

Thank you for the woodworking lecture this morning Rob! Quite fascinating!
I like the wormy texture so I would go the ‘put them in the oven’ to kill the bugs and then make some really cool stuff out of the boards!

-- Mike, A Yooper with a drawl, http://www.artcentergraphics.com

View stefang's profile

stefang

16862 posts in 3896 days


#7 posted 11-30-2019 01:25 PM

Those beetles sure know how to work wood!

-- Mike, an American living in Norway.

View Dave Polaschek's profile

Dave Polaschek

4306 posts in 1144 days


#8 posted 11-30-2019 02:24 PM

They sure chewed that up real good, Rob. I may be paranoid, but I would be tempted to bake everything to make sure there weren’t any more of those little critters running around my shop.

-- Dave - Santa Fe

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com