Tree Borer and how to get rid of it
tree borer a little bug that doesn't live up to its name.
The borer doesn't confine itself just to citrus. It could be lurking
in any tree, silently killing them.
For this bug item we
take you to the dizzying heights of a golden elm, because what we've
found here are the clear signs of the bane of most gardeners
lemon tree borer.
To explain the life cycle
of the lemon tree borer in the tree is almost impossible. We have
to cut a branch to show you the grub not a good idea in the
warmer months of the year. When you cut a branch off a suitable
host tree of the lemon tree borer in the warmer months, the adult
beetle will lay its new eggs on the cutting wound. That's how you
get your infestation.
By the way, the lemon
tree borer's a native of NZ, and it lays eggs in elm trees, citrus
trees you name it. Anything can be affected, as long as the
wood is alive.
Now, out of these eggs
come little grubs that tunnel into the wood. The grubs grow, and
they grow as big as this one. Here's one of the grubs of the lemon
tree borer. They go right through the branches and through the stems.
They cut themselves that by eating the live wood at the front and
excreting loose sawdust at the back. If you do that, sooner or later
your excrement catches up with you, so what does the borer grub
do? It makes little holes to the outside world and gets rid of all
Those holes are actually
very handy, because if you can't cut the branches off, you now have
access to the main tunnel, via the outside, via their own toilet
holes. And that holds the key to organic control of the lemon tree
So, here we're back in
our possie, looking at the excrement of the lemon tree borer. I'm
going to remove that first. I'm going to get myself a guitar string
I prefer to use a G string, but the B or the A will do
and I'm going to put that into the hole and hopefully spear the
little devil into its you-know-what.
An alternative way to
go is, if you're not so into perverse methods of spearing them is
to get yourself a hypodermic needle with kerosene. You can use their
toilet hole as access to fill up the main tunnel. It's not too bad
for the tree.
When you've done that,
get yourself some Blu-Tack and literally clog the hole up. The kerosene
fumes will do the killing of the borer grub. See how nicely you
can get at the grub without having to saw the branches off, which
is not a good idea in summer, because these adult lemon tree borers
are on the move. They sniff every cut you make.
The way to go is organic
simple. It doesn't harm the tree, and the borer stops its
with permission from NZOOM Home and Garden content,
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