Wasp Observations: Harvesting Wood Pulp and Hive Incursions

It's a little early in the year to be talking about wasps.
However in the last few days I've had a couple of reminders that during the summer the wasp colonies are already with us and are growing steadily.


Introduction
In the spring hibernating queen wasps wake from their winter slumbers and set about building tiny wasp starter homes out of sculpted wood pulp with a few cells to lay their eggs in.
These do look quite cute but, actually, they are not cute at all.

Tiny wasp starter homes built in the spring by the queen wasp

Once this initial build has grown to a reasonable size she stops foraging and constructing and leaves those menial tasks to her workers so that she can concentrate on the egg laying.
To build the nests the wasps have to gather wood, pulp it down and stick it together into those familiar papery ball-shaped nests which hang menacingly from trees or appear in your attic seemingly from nowhere.


Wasp Observation #1
Last week, whilst holidaying in the Baltic (oh yes indeed!), we were presented with an excellent example of wasps harvesting wood pulp to use to build their nests.
I spotted three wooden benches on the seafront which had a lot of wasp activity around them even though there was no obvious prey, no sugary drinks and no ice creams anywhere nearby.
I decided to sit down and observe what the wasps were up to. Sure enough, they were landing on the benches, chewing off a thin layer from the surface of the wood and flying off with it.
The pattern of the chewing seemed to be always the same: a straight line about an inch long furrowed into the surface of the wood.

Wooden bench with evidence of wasps harvesting pulp for nest building

The nest grows as the colony grows until by the end of the summer it's a full blown papery nest full of critters and the stripy villains then start to become a problem for picnickers and beekeepers alike.
So, I guess, in about a month's time there's going to be a pretty big wasps' nest in the vicinity of Travemunde seafront.
Incidentally, a few years ago, I observed wasps harvesting pulp from a length of 12mm balsa in my garden and the crunching sound that they made was significantly loud. By the end of the summer they'd managed to bite right the way through it.


The wasps don't usually become a major problem for the hives until the end of the summer when their colony has reached maximum size, the honeydew-secreting larvae have all grown into adults and the flyers need an alternative sugar fix.
If your hives are in the vicinity of bins full of food waste, areas with lots of wood chip or orchards with rotting fruit the wasps will already be attracted to that area.
They will persistently search for weak points to gain access to the hive.
However, if your colonies are weak, you can have problems with wasp incursions much earlier in the season...


Wasp Observation #2
Today we were working on the hives in Apiary Central in the park opposite Spike Acres.
There are two colonies there at the moment: one is strong, the second is weak.
I observed the comings and goings at the entrances for a while and noticed that wasps were trying to gain entry to both hives.
They were constantly repelled from the strong hive but gained access several times to the weaker hive.

Wasp incursion into a weak colony: Apiary Central in the local park

On opening the second hive there was evidence of honey robbing.
It's a free feed for persistent wasps with the weaker colony unable to resist them.
There is a frame feeder in this hive which also is a major attraction for wasps.
We have just re-queened this hive and tomorrow we will be reducing the entrance to 3 holes to give the bees a greater chance of making a defence against further incursions, much like Horatius on the bridge across the Tiber...
We will also set some wasp traps.

It might be a long war of attrition against the wasps for this hive this summer.


If this leaves you thirsting for more wasp information, rest assured, the LandofBees blog will be revisiting the subject of wasps in the near future.