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Freezing Mealworms


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6 replies to this topic

#1 Offline N_BNZ - Posted May 14 2018 - 6:39 AM

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I have a small colony of Camponotus Herculeanus and want to make sure they get a varied diet so got them some fruit flies and mealworms.

I've read many times its a good idea to freeze insects before feeding to reduce the risk of mites and it means you can buy a tub of something and store it, as clearly with only a handful of workers it's going to take a while to get through them.

However when I defrost the mealworms they turn black, is this normal? They don't look great will they eat them? Did I manage to mess up freezing Mealworms!?

Any help is gratefully received.

#2 Online YsTheAnt - Posted May 14 2018 - 6:58 AM

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Instead of freezing them, dip them into boiling water for a few seconds, it'll kill them and all harmful organisms on them (mites, mold spores, etc.) It keeps the insides nice and mushy for the ants :).

#3 Offline sirjordanncurtis - Posted May 14 2018 - 10:17 AM

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The ants shouldn’t be too picky about what color the worms are. How do you defrost your worms? I would put them in water for a few seconds first.

#4 Offline N_BNZ - Posted May 14 2018 - 10:58 AM

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Tried just letting them warm up and in hot water and both times turned black... Figured freezing would stop me having to deal with a big box of whatever mealworms turn into.

#5 Offline AntKeeperNoob - Posted May 14 2018 - 11:23 AM

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I typically boil mealworms for several minutes and actually cook them before freezing. When I thaw it to feed ants the mealworm flesh do not turn black.
The mealworm flesh is more solid but I have fed it to lasius, myrmica, crematogaster, apheanogaster and camponotus species. They all seemed happy to eat it up.

#6 Offline CoolColJ - Posted May 14 2018 - 1:59 PM

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I think they sometimes take on some black stuff inside due to waste or some defensive mechanism when they are about to die from the freezing.

I know Witchia grubs ooze some brown stuff in the same conditions


Current ant colonies -
1) Opisthopsis Rufithorax (strobe ant), Melophorus Sp1. (furnace ant) red and black, Melophorus sp2. black and orange
Camponotus humilior,  9mm queen red head Phediole sp, 7mm queen all black Phediole
Polyrhachis rufifemur, Camponotus suffusus

Journal = http://www.formicult...sp-furnace-ant/


#7 Offline Straywolf94 - Posted May 14 2018 - 3:27 PM

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I'll try flash freezing some in liquid nitrogen to see if that helps. Will post results later this week.




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