search the Beediverse Blog


This is the time when parasitic wasps can produce another generation every week.  During the summer months, when temperatures  are higher than in spring and fall, these pesky little critters come out of the nest and search for new mason bee cocoons to parasitize.  I don’t know how, but these tiny adult wasps can make a tiny pin hole in the tube and crawl out and parasitize more bees.

Every July, when most bee eggs have turned into adult bees inside their cocoons, I gather all nests, set them under a veranda- where the ambient temperature is still warm.  I place two Highrises per net-bag (see wasp proof bags on my web site beediverse.com).  They sit stacked against the wall of my home until the end of September when harvesting takes place.

I find  that net bags are successful and keep out wasp parasites.  Percent parasitism is usually not more than 5%.  If you have had trouble with these parasites, you will be pleasantly surprised with the outcome.

4 Responses to Protect your mason bees from the tiny parasitic wasps

  • Marnie Johnson says:

    I tried to subscribe to your blog and got an email back but when I opened it all it said was
    0A 09 0A etc with an equal sign between each. Please help. I am new to mason bees. We are having fantastic success. Our tubes are filling up rapidly. Need all the info I can get. Thanks

  • Al Mitchell says:

    I found one of these wasps and video taped it for hours. It may be parasitizing mason bees, but if so, it has found another nest not far from my window. Watch and tell me what is going on here. There is also a part two. And I am now video recording further work by this wasp for part 3.

    http://youtu.be/Vq49vmf7fFQ

    Mitch-

    • Margriet says:

      pretty neat- I have watched the first video clip and I think it is a parasitic wasp. It is hairless and has a narrowing of the ‘waist’ It could be parasitizing an egg that is already inside the tunnel.

Leave a Reply

Your email address will not be published. Required fields are marked *

*

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Popular Posts

Stop parasitic wasps by using a net bag

Stop parasitic wasps by using a net bag

December 10th, 2013

From summer to early winter place mason bee homes inside a net bag.  This will prevent your mason be[...]

What mason bee is this?

What mason bee is this?

December 10th, 2013

Hi,   I have a number of bees at one of my houses this year. I’m familiar with the Blue one but [...]

How many mason bees do I need to pollinate my small orchard.

How many mason bees do I need to pollinate my small orchard.

December 28th, 2013

A question from Gary, WA.  "Approximately how many bees do  I need to pollinate  17 fruit tr[...]

Super walls- a closeup

Super walls- a closeup

December 10th, 2013

   When bee finds a nesting tunnel in wood, plastic or some other material, the female bee will plac[...]

Winter cocoon storage in the Kootenays

Winter cocoon storage in the Kootenays

December 28th, 2013

A question from Anne in the Kootenays (BC). " I was given your starting kit as a gift, and I [...]

Dates of posting blog entries
July 2014
M T W T F S S
« Jan    
 123456
78910111213
14151617181920
21222324252627
28293031