So I am designing a bin and I want to use PVC as the tube to deliver the grubs to the chicken's .
I have read reports of before larvae not following the assigned path and climing any way they please.
I plan on discouraging this with a barrier. The only one. I have found so far that reportedly works is the 9 volt electric "fence" sometimes used against slugs.
Does anyone know of another barrier that works? I was considering petroleum jelly with hot pepper ...
I am fairly certain that I read a discussion of this issue on the Bio-Pod web site. I believe they found a strip of the hook side of hook and eye tape to be an effective barrier.
The issue is a mechanical one, as long as the larvae have a reasonably smooth surface to climb, they can slither right up a vertical face. Once they lose the adhesion they get on that smooth surface (I suspect it is a matter of surface tension) they will fall back.
The commercial biopod has a lip along the upper edge that would force a larva to crawl upside down to escape anywhere but along the designated ramp. Perhaps if the surface were completely wet, one could theoretically cling and move over this, but I doubt it. One would have to be able to crawl four or six inches along an upside-down surface to escape through the vent holes in the lid. I have hardly ever seen one even try to climb the near vertical walls of the pod below the lip, for that matter. But my pod tends to run dry.
Alder Burns (adiantum)
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