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Why are wasps so irritating?

Author Jess Price

intoxicated wasp / Alan Price
intoxicated wasp / Alan Price

Here at Woods Mill, we have a small staff garden where I like to spend my lunch breaks. Unfortunately instead of enjoying the last days of summer, over the past few days I have been driven inside by the persistent buzz of wasps attempting to get at my apple, my sandwich, my yogurt, my drink! Wasps have been around all year, so why is it that they only become so irritating now?

The answer actually lies in the unusual ecology and bizarre anatomy of social wasps.

In the spring queen wasps wake from hibernation and start to build their nest, laying eggs and raising their first brood of daughters. These worker wasps cannot produce fertilised eggs so spend their time helping their mother expand the nest and raise more young.

One of their main jobs is searching for soft bodied invertebrates to feed the developing larvae. Bizarrely adult wasps cannot digest the food they catch because their gut is so constricted by their thin wasp waists. Instead the workers chew up the prey and feed it to the larvae. In return the larvae produce a sugar rich spit that the workers can drink.

The colony will go on expanding throughout the summer until the queen decides to produce males and new queens. After these reproductives have left the nest the old queen stops laying. This means the workers no longer have access to larvae. Instead they live on the sugar produced by rotting fruit. This can be a problem because fermenting fruit contains alcohol so wasps can become intoxicated and rather irritating.

They are also attracted to the abundance of sweet foods that humans provide. To a starving wasp a jam sandwich or a can of coke is just too tempting to avoid. For this reason wasps are generally only a nuisance in late summer. Remember that these drunken workers dont have long to live, as soon as the winter weather sets in the entire colony will die leaving only the new queens to hibernate through to next year.

Comments

  • Sarah-jane de Havilland:

    16 Sep 2012 03:34:31

    So that explains why they r so pesky its quite sad really useful all their lives then wen not needed by Queen anymore – turfed out to starve that’s nature for u. !!

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