[Avodah] kneppel etiology

[saul newman via Avodah]

it  seems to be  harder to find kneppel'ed lulavs.  i can understand
pre-packaged lulavs [which i hadn't seen in the marketplace here before ]
kneppels won't pass muster with litvishe hechshers.
but even the regular shipped in bundles seem to be kneppel free.  does
anyone know if kneppling is a genetic or infectious deformity of the date
palm?

gmar tov to all
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