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About stanislas

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    Belgium (Europe)

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  1. Thanks! It took quite some pictures to get it right and luckily the sun was shining, so the light was ok (and a good camera+lens helps). And I'm glad to have these babies. For a particular reason: my Eupolyphaga sinensis population is in quarantine due to a Sancassania berlesei mite problem. These mites came with the animals I bought. I haven't managed so far to get rid of the mites. They are though and have a special kind of nymph stage (hypopus) that attached itself with suckers to the roaches. They don't do harm to the roaches. They rather use the roaches as transport to food sources (phoresy). None the less I do not want them in my roach collection. So I collect the ootheca, clean them thoroughly and keep them seperate. That way I hope to start a new colony without mites. Well, now I have the first nymphs going
  2. My first Eupolyphaga sinensis nymphs appeared! I managed to get some photographs of the 2 day old nymphs. They must have eaten already, as their intestines got dark. They are about 3mm / 0.12 inch in length. The ootheca hatched after about 6-7 weeks (at constant 28C / 83F).
  3. From: Phenols as defensive secretion in a Malayan cockroach,Archiblatta hoeveni vollenhoven, Journal of Chemical Ecology,May 1978, Volume 4, Issue 3, pp 375–381: "They produced sharp chirping noises and re- peatedly sprayed us with large quantities of a stinking fluid. " "A quantitative analysis gave a ratio of 274:1 (p-cresol to 1 phenol). " P-cresol <-- bad smell Phenol <-- nasty
  4. You could go for a slow growing species from the Corydiinae subfamily. For example an Arenivaga, Eupolyphaga or Polyphaga species? They are easy and handsome (in my biased opinion). Their reproduction is rather slow, so it will certainly take a while before you start thinking of them as a 'feeder'. On the other hand, once you do get there, I'm not sure if all recipients on the other side of the feeder business can palate these roaches. Perhaps it's better to sell them by that time.
  5. Polyphaga saussurei. The less flexible body and the loose sand are a bit too much... These cockroaches tend to take 'their time'....
  6. And a male Eupolyphaga sinensis on his back (note that it's a 'white eye'):
  7. Out of curiosity to see how different cockroach species handle being on their back on sand, I made some videos. Fine sand is very difficult for insects deal with... First: Eupolyphaga sinensis female:
  8. It's tempting to put their DNA on one of the sequencers here (I'm working as labspecialist and bioinformatician in a human genetics lab)...
  9. There have been predatory cockroaches in the past: Ancient predatory cockroach found (BBC)
  10. I use Hypoaspis miles predatory mites in my enclosures. I added them after a grain mite infection (my own fault) and after I got Eupolyphaga sinensis roaches that carried Sancassania berlesei mites. The grain mites were no match for the predatory mites, but the Sancassania mites fared better (but their numbers are dwindling). I also have the impression that they took care of the fungi gnats (those small black flies). They have become rare as well. All my enclosures have predatory mites. Their numbers stay low. For me they work well. I don't think one has to fair a 'hostile' mite take-over. They are self limiting once their prey is on the verge of extermination. That's my 2 cents on the matter.
  11. UK?

    So Kyle does ship to Europe? I live in Belgium, and I'm looking for Arenivaga roaches as well. Maybe we can split costs
  12. Probably of interest: Cockroaches Their biology, distribution and control World Health Organization, 1999 (May be freely viewed, abstracted, reproduced and translated) link to document Excerpt: P 20. Polyphaga saussurei Biology, life cycle and ecology It has been reported that under the conditions which prevail in the range of this species 3.5-4 years may be required to complete its life cycle. While this may seem rather long, it must be remembered that this is a large insect and the weather conditions in that region can be rather harsh. This species is adapted to live in loamy or clay soils. Because of this fact, it thrives in housing with clay floors and walls. It is reported to be capable of parthenogenesis and is an important domiciliary species in south-central Asia (Bey-Bienko 1950).
  13. I don't know the optimal breeding temperature. Although I think room temperature would do fine. I can't immediately find the article I've reads about the life cycle of Polyphaga species in the region where one can find Polyphaga saussurei. I remember it to be a life cycle of hibernating in winter, becoming active in spring, reproduce (males in nature search for the females at night) and lay eggs during summer and autumn. The eggs hatch next spring. After which the cockroaches grow during summer and autumn. Males probably become adults after a year, females perhaps after two years. That also explains why these eggs take so long to hatch. Considering the habitat and the life cycle, I believe it also explains their slow growth. They indeed tend to dig deep. Mine are mostly at the bottom of a 2 inch substrate, I'm sure they might get deeper if I added more. They do exhibit some kind of crepuscular activity pattern here (although I should do some kind of statistical analysis over a longer period to conform this): Interesting to now that they eat collard greens. Good to know that. I found on a Russian site that they also eat cow and horse dung. So I tested the latter (dried), and they indeed showed interest and ate a bits of it.
  14. They (Chinese) indeed breed these roaches en mass. There are in fact a lot of patent description available that describe methods to breed them. The English translation isn't particularly good (rather abysmal), but it contains a well of information: breeding patent eggs hatching method And there are many more....
  15. My roach colonies were full of these gnats. This is what I did: - Reduce moisture in the bins. - Smeared non toxic silicone grease on places where the roaches didn't come, but the flies did. The gnats land on it and get stuck. I ended up with hundreds, of not thousands, of dead flies on the grease. - Added predatory mites. Occasionally I still see fungus gnats, but their number is on the low side.