Black Soldier fly larvae safe for cocoons

pjames(8/LA)June 13, 2009

I have read where soldier fly larvae will not harm or eat the worms themselves but will they eat the cocoons they come across?

I have read where the maggots can actually help transform raw material into something the worms can easily consume. I am considering adding 50 or so to a bin I have in my garage but don't want to to attempt it if the larvae are going to eat the cocoons.

I have thousands in the top of my regular outside compost bin and was impressed at how fast they have processed kitchen scraps. Even a paper towel roll was partially consumed the day after it was added.

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boreal_wormer(Alta Canada)

Don't know the answer about cocoons but there's a good thread about BSFL in these forums at the link below.

Here is a link that might be useful: All about Black Soldier Fly

    Bookmark   June 13, 2009 at 1:08PM
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Too many BSF larvae can cause the bin to heat up too much for worms. I dont' have any experience of them myself- but at the rate they seem to grow and break down material- you can imagine how much heat they'd have to generate.

    Bookmark   June 13, 2009 at 1:32PM
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I can't be too sure as I don't have a scientific method to measure it, but I've had my worm bin for a year and "innoculated" it with BSFL about a few months into it. Just harvested the worms the other day and saw plenty of little babies, and there were ALOT of BSFL, so I'm positive that they don't really have an appetite for worm cocoons

    Bookmark   June 13, 2009 at 4:11PM
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No, BSFL won't eat cocoons, based on my observations, anyway.

If you're talking about adding 50 individual larvae to a bin with a thousand or so worms, have at it! But you should be aware that adult BSF will attempt to lay eggs in any container holding healthy and happy BSFL.

Also, BSFL break down a lot of material, quickly, into a small quantity of worm treats _and liquid_. So check your drainage while you're checking your bin's integrity.

Best wishes from a half-reluctant BSFL caretaker,


    Bookmark   June 14, 2009 at 9:30AM
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I opted to not put them in with my EF's. I had moved my adults from a small colony of hortensis though to a smaller bin inside the house. I thought it was too hot in the garage and that was why they didn't seem to be breeding. The BSFL's went into that bin. Maybe a hundred or so. I doubt that adults will be able to get in there to lay more eggs.

I'll be curious to see how much these little bugger can eat. They seem to be tearing through my outside compost bin. So much so I decided to test it with a squirrel that was unfortunate or dumb enough to get trapped in the havaheart trap i put by my veggie garden.

    Bookmark   June 14, 2009 at 8:55PM
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There are great time-lapse videos on youtube of BSFL devouring hamburgers or rotten fish. Pretty awesome!

    Bookmark   June 14, 2009 at 11:32PM
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rj_hythloday(8A VA)

I had them in my worm bin last year, this year they're in my ''cooking'' compost pile. I've seen lots of adults hanging around the worm bin, but no larvae. Probably not wet enough for them.

    Bookmark   June 15, 2009 at 12:39PM
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boreal_wormer(Alta Canada)

The folks over at the BioPod forum are trying to build a reference source for people trying to learn if BSF are present in their area. If you've got a minute consider posting at the link below.

Here is a link that might be useful: Confirmed Black Soldier Fly Sightings

    Bookmark   June 15, 2009 at 3:54PM
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