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Old 07-11-2006, 06:00 PM
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Default jewel wasps that parasitize hydei?SUCCESS!!(definately)

ive got a couple hatching out in a culture i found infected thru an opening too small for the hydei to escape. do the "regular" jewel wasps infect hydei?
UPDATE: arghhh!!! i put the lid from the original hydei cutlure on an empty cup and replaced the lid to check if more would appear in the original culture. well there are a dozen jewel wasps in the cup and 3-4 on top. i dont see any jewel wasps around my new cultures so i`m back to the drawing board. cant be sure since the lid was never sealed.
i threw out the first culture because it stopped producing or i lost track of it. well ive got 6-12 jewel wasps in a new culture to start with and i put the original lid w/ parasitized pupae on the new culture. hopefully, since they are parasitizing earlier and there are more breeders, i`ll see better results this time around.
there are already over 25 wasps in this new culture, just takes a little time for them to hatch i guess. i should have some available at mwff if anyone is interested. keeping my fingers crossed.
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Old 07-11-2006, 06:52 PM
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Jewel wasps are very prey specific, the jewel wasps used in the hobby in the past were used as biological control for the not so good flies... I believe they were carnivorous flies, but another page said the jewel wasps were invading houseflies (may have been different species - the housefly parasites are better since housefly pupae is readily available). These specific species would not "infect" Drosphila.

This is not to say what you've got isn't a jewel wasp, it would actually be rather cool if it was, since Drosphila are so easy for use to culture. If you could keep them going, that would be rather cool, tho could be problematic if you kept them in the same room with the hydei cultures you were raising up to feed out :roll: That was one of the pluses of the other jewel wasps - they wouldn't infect the foods we were already raising and their infestation could be "controled" that way.
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Old 07-12-2006, 03:09 AM
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well, it started off w/ one about a week ago. i set the culture aside as ive seen jewel wasps before and was thinkin i might be on to something. now there are about a dozen walking around parasitizing pupae. they are about 2x the size of a springtail and dont seem to fly well. i wonder if they are a form that generalizes on fruit flies or if there are wildtyppe hydei native to this area.
the only way it got in was due to moisture loosening the lid paper enough to let a larvae wedge its way between and pupate half in half out, blocking the entrance 90%. since it got in late, i wonder if they would infect 100% of the larvae and produce only jewel wasps.
i dont think i`d have to worry about them getting into all my cultures.
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Old 07-13-2006, 09:47 AM
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Here's a thread I posted some time ago in which I included some not so great pics of parasitic wasps that appeared in my hydei:

http://www.dendroboard.com/phpBB2/viewt ... itic+wasps

(Edit--actually, the pics aren't bad, taken through my dissecting 'scope, but the wasp specimen itself was pretty decrepit..)

(Second edit: I think it's pretty cool how much smaller the wasps were than the hydei...)

(BTW: Like Patty, I used to buy wasp pupae to combat stable flies when our goats' stall was overrun with them. Would have preferred Muscovy ducks, but couldn't house them properly at the time...)
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Old 07-14-2006, 12:04 PM
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i`m not sure that those were parasitic wasps.
heres a pic of the ones i have, they look a lot like ants

i cant get the image to show. anyway, those look like gnats i think w/ the wings up like that. parasitic wasp wings seem to, how do i splain, lay flat over the body hugging the back and their abdomen,head and thorax pinch more between the segments.
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Old 07-14-2006, 05:17 PM
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They were definitely hymenopeteran, not dipteran. But I did not have a good specimen to photograph. This one had been rolling around in a vial in the freezer for some time before I got around to looking at it.

It's been a long time since I had these, but I tend to think the live ones held their wings in a more "waspy" way.

There are very many spp of parasitic wasps, so it's quite possible, I would think, that different ones could appear in different regions.
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Old 07-14-2006, 09:54 PM
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i`m sure they could and you sound like you know more than me. i should have said they dont look like the ones i have, my fault.
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Old 07-14-2006, 11:19 PM
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Old 07-14-2006, 11:30 PM
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Nice shot! May be more like what frogfarm has.
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Old 07-15-2006, 11:47 AM
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thanks sports doc. i`ll figure it out sooner or later.
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Old 07-20-2006, 09:39 PM
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oh well. i got excited for naught. looks like they are killing some pupae but no wasps hatching.
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Old 07-23-2006, 05:00 AM
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Default Re: anyone find jewel wasps that parasitize hydei?

I can't be sure what you mean by jewel wasp(s). Many many.

Spanglia species will host most all fly pupae that are decompers including fruit flies, and probably those of flesh fly larvae (bots). So it worries me when Corey states they are species specific, sure some no doubt are specialists, but she didn't define what she was trying to represent and she must of been thinking there's only one or if not they all fall into that host specific catagory? If not the smallest wasp sp. it's damn close, just perfect for a thumb but somewhat impractical to mass produce any substantial quantity worth giving.

There is also at least one trichogramma that not only infects one host type but will parasitize hundreds possibly thousands of varying hosts from aphids to moths and flies to the eggs of most other local insects.

I thought jewel wasps were parasites to the cambium layer of certain trees found in the tropics. I could very well be thinking of something else but I thought it was jewels wasps?
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Old 07-24-2006, 02:08 PM
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UPDATE: arghhh!!! i put the lid from the original hydei cutlure on an empty cup and replaced the lid to check if more would appear in the original culture. well there are a dozen jewel wasps in the cup and 3-4 on top. i dont see any jewel wasps around my new cultures so i`m back to the drawing board. cant be sure since the lid was never sealed.
i threw out the first culture because it stopped producing or i lost track of it. well ive got 6-12 jewel wasps in a new culture to start with and i put the original lid w/ parasitized pupae on the new culture. hopefully, since they are parasitizing earlier and there are more breeders, i`ll see better results this time around.
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