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gringojay

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gringojay
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  • Hi genoc, - You probably have seen research on feeding insects to farmed fish. My read is they are not suitable as the only feed - for various reasons. What kind of fish are you trying to grow? Presumably you are looking to alter their nutrition du…
  • I have read crickets fed mint take up that taste. Thais cut down protein before culling & feed pumpkin for some days for better taste. Maybe you are only doing a "gut loading" by feeding cinnamon for a day & the amount inside at time of co…
  • Again heritageacres, - While have a moment wish to elaborate. Again, I am assuming your mealworms were selected by larval size for breeding somewhere along the way. Over time this selectivity likely meant there was eventually inbreeding (big siblin…
  • Hi heritageacres, - One thing that makes some insects larger is by them getting extra time in their developmental cycle eating. This can mean taking an extra instar phase instead of going to pupation as early as they potentially could. Lots of fact…
  • My primary suspect is Serratia marcescens (there are pigmented & non-pigmented variety) whose infections are long known yo be common in lab reared insect operations. They have flagella (can "swim") & can grow on starch. Humans also have pro…
  • Hi sinbaddang, - Since I do not rear crickets my knowledge of this is not precise. However will say what comes to mind if might interest you. First, my impression is that you may have reversed the crossbreeding outcomes; namely that in time the pr…
  • Hi JButera, - When CO2 builds up the cell membrane alters, negative charged ions build up inside that cell & ATP (cellular made energy) gets low from energy diverted toward putting protons out of that cell. This can involve the circulating haem…
  • Hi Maxing, - Probably the male's antennae touched the female's; your nearby females left alone did not make that contact. The following study available on-line as free full text may be dense reading. (2015) "Releasing stimuli and aggression in crick…
  • Hi aluevera, - I am having on-line problems. Will only post this for now. However, saw one article discussing "new wax comb" (not aged bee wax comb or any pollen) "... prolonged immature stage duration ...." However, "new wax" diet was also associ…
  • Hi aluevera, - Neem tree seed compound Azadirachtin is an insecticide. There is no reason I can think of why you would find it suitable to use on any insect being bred for production.
  • Again aluevera, - As mentioned elsewhere in Forum frass has farnesol which in quantity prolongs larval duration instead of normal pupation. I think accumulating frass from your wax worm & introducing extra quantities of that to them is the most …
  • Hi DaMeteor, - Forum thread "Data Resources" has several insect composition references. These are always based on particular test subjects and are not absolute ratios, but good guidelines. Feeding high protein diets to insects generally raises the…
  • Hi Maximus, - There are other insecticidal compounds. Another popular "natural" insecticide is Neem tree seed oil extract azadirachtin. Do you know the veggies' source - market place or grower? In theory there are time restrictions on how soon aft…
  • Continuation: The silk gland has 3 sectors. One end is the portion having cells where different molecular weight proteins (fibroins) of silk are made (mostly containing amino acids serine & cysteine). The cells then put out these proteins into …
  • Hi aluevera - Wax worms ecdysteroid hormone (ecdysone, 20-E, 20-hydroxy-ecdysone) levels peak 24 hours before it sheds the old cuticle & lives as a 6th instar. In contrast their juvenile hormone levels peak at the time of shedding that old cutic…
  • Hi Maximus, - Determining Bt is quite involved. The following (2010) report is available on-line in 2 free formats: "The detection of Bacillus thuringiensis in mass rearing of Cactoblastis cactorum ...." Authors believe their contamination came fro…
  • Hi Maximus, - My response has to be hypothetical. Although based on the way G. sigillatus was promoted as an alternative to house cricket A. domesticus colony susceptability to virus the following may make sense. Bacillus thuringiensis ("Bt") form …
  • Hi PerusseMig, - Try entering "oviposition" into Forum search engine on right side of when viewing in "Web" version (select at bottom left page). There are quotations & text links about managing egg laying (oviposition). I personally try to "ha…
  • Hi EntoAaron, There is a Forum thread "Stink Bug". My impression is wild collection is cheaper to do seasonally. The money to be made rearing insects as food for reptile owners is possibly the major factor that made investment in bug farming start.…
  • Forum has been down for me so am seeing your question only now. My thinking is you would be able to contact the SouthAfrican 2017 thesis writer I linked you on thread "mealworm vs. bsf" Devon Brits through Stellenbosh University for getting fresh …
  • Hi mkadir, - I bumped that Forum thread back up today. Let me know if any of it relates to how you are keeping your larvae.
  • Bumping this because refered to it recently.
  • Hi mkadir, - It is common for a few mealworm pupae to die; usually related to that individual of the colony's health when it was a late instar larvae. Without knowing how you are managing pupation one suggestion for now is looking back to see the Au…
  • Hi JButera, - As stated before I don't rear crickets, so the following may be out dated. 32 -36 °Celsius was used by Parajulee, DeFoliart & Hogg when trialed mass Acheta domesticus rearings in 1993. This temperature for eggs was cited as being …
  • https://www.researchgate.net/profile/Longyu_Zheng/publication/229307779_From_organic_waste_to_biodiesel_Black_soldier_fly_Hermetia_illucens_makes_it_feasible/links/548e9c660cf2d1800d843062/From-organic-waste-to-biodiesel-Black-soldier-fly-Hermetia-i…
  • Hi Abdoullah, - Black soldier fly larvae "fat" (oil, lipid) in published research has been obtained by grinding them up & placing the mash into a porous bag, then submerging that filter bag for 48 hours in petroleum ether (solvent) at ambient t…
  • Hi Savaru, - there is a Forum thread of "Data" with several links to specific insect composition. Find search function on right side of page when connected to "Web" version (option appears bottom left of page).
  • Hi mkadir, - The "lesser" mealworm is not the same as the more commonly reared "yellow" mealworm, although both are sometimes just refered to as "darkling" beetles. There are lots of on-line pictures & entomology descriptions using the scientifi…
  • Hi Moofisilla, - Since you have 3D fabrication available I think you may be able to design a separation ramp. Mealworm larvae before pupation will "wander", driven by hormonal titre changes, & I see this in TinyFarm grow bags as larval pile ups …
  • Hi YOMANU, - Here is what I think is happening with automatic siever machines. Firtst of all my impression is the mealworm farmers are not dealing with larvae that have very different sizes. In other words the commercial operations take what the br…