Jump to content

Polyphaga saussurei die off


Recommended Posts

While checking my bids I thought to do a count of my Polyphaga saussurei, I started with maybe a dozen small nymphs and have had some slow die off (1 every two months or so), just infrequent enough it was easy to miss.

On this most recent check I lost my largest adult and smallest nymph, and have 4 large subadult nymphs remaining. Since this species is parthenogenic I just need one producing adult to keep my culture alive.

The odd thing is that I keep two other related species (P. aegyptiaca  and E. sinensis) in virtually identical conditions in adjoining bins that were started at the same time, and both are thriving with a good number of ootheca. 

Any thoughts on what could be the cause and what steps I can take to resolve it?

I have all 3 species in well ventilated 6qt bins with coco choir and hardwood leaves, feeding beetle jelly and koi food pellets. Jelly is always available and I keep one corner of the enclosure moist and leave the rest bone dry (misting the whole enclosure occasionally). I use a heat mat to provide a warm end of ~78F, the rest of the enclosure is room temp (~73-75F)

Link to comment
Share on other sites

I'd maybe consider making the moist area a bit bigger, maybe to cover a third of the substrate. That's the only issue I can personally think of. 

Link to comment
Share on other sites

I'll try that, I was thinking I might have let their tub dry out a bit too much. The moist end is on a heating pad that seems to dry out the substrate even though it's on a thermostat and not on very much.

I'll turn down the temps a bit and add more water.

Link to comment
Share on other sites

  • 3 weeks later...

Yeah heat pads/cables do dry the substrate out pretty quickly, I'd put the moist area on the opposite end of the heat source. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...