Separating Mealworm Eggs From Adult Beetles

Last Updated on May 4, 2021 by Jeffery

When mealworm beetles lay eggs, they will often cover them with the material you’ve used as bedding. This makes it difficult to identify the eggs from the adult beetles until you start looking closely. It’s very important to separate the eggs from the adults and place them into their own hatchery.

This has several benefits, including keeping things well sorted and a nice supply cycle all neatly timed out. It also keeps the various sizes of mealworms from eating each other.

For this you will require:

Start by taking your bin with adults and eggs, and dump them through the 1/8th sieve. You will be left with a pile of beetle eggs and substrate on one side, and the adults on the other.

Take the eggs and substrate and place them into the hatchery container for further processing. As for the adult beetles, Replace them in the initial egg-laying container and add more substrate for them to continue laying eggs.

There shouldn’t be much frass to deal with between these 2 bins as they don’t eat much during these times. Especially if you’re doing this 1-2x a week.

Adult female beetles will lay up to 500 eggs at a time, So each sieving will reveal thousands of eggs and soon-to-be mealworms, assuming how many beetles you have.

As you can see, it’s very simple to separate mealworm beetle eggs from adults, and you’ll have more than enough of them for your next-generation mealworms.

You may notice tiny white eggs that seem to be stuck to the bottom of the container. This is a good sign and means you should continue to add new substrate to the laying container because the battles are continuing to lay.

Once you notice the little white egg patches are starting to thin out or disappear during future savings, It means the adults have begun to stop laying eggs and may need to be swapped out for new ones.

To clarify, you do not need to scrape the eggs off the bottom. They are not glued to the substrate or bottom and will come out in the next cycle of sieving.

How often will darkling beetles lay eggs?

Darkling beetles will continue to lay eggs until they are removed from the container.

How long do darkling beetle adults live?

Darkling beetles as adults will survive for a couple of months. If your accounting for their entire lifetime from egg to adult, it’s about 1 year.

Where do darkling beetles lay their eggs?

Darkling beetles will dig themselves down into the substrate to deposit the eggs. You may occasionally see eggs on the surface, sometimes dragged up by other layers, or just a careless beetle laying on the surface. It could be a sign of other issues.