Adult diet: equal amounts of protineX, yeast, honey and sucrose along with 50% honey solution.
Temp and RH: 27+-2 degree C; 70%
Observation: eggs get black and shrivelled; some also form embryo inside but still don't hatch.
What about provision of light?
Please go through this paper once!
https://www.researchgate.net/publication/263543091_STORING_EGGS_OF_CHRYSOPERLA_EXTERNA_HAGEN_1861_NEUROPTERA_CHRYSOPIDAE_FOR_MANAGEMENT_OF_LARGE-SCALE_REARING
There are so many factors that can influence hatchability of eggs and size plays a big role. In ostrich eggs, we found that small eggs that weighs less than 1200g are unlikely to hatch. Hatchability for small eggs is lower than medium and large eggs.
Other factors contributing to failure of fertile eggs to hatch include insufficient nutrients in the egg and exposing the egg to conditions that do not meet the needs for the developing embryo.
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