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Date: | Thu, 1 Apr 2021 09:48:24 -0400 |
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> Can anyone cite a reference that actually determined that bees coat the inside of brood cells with propolis?
Huber describes this in minute detail in:
Huber, F. (1821). New observations on the natural history of bees. W. & C. Tait, and Longman, Hurst, Rees, Orme, and Brown, London.
More recently:
Propolis, or bee glue, is another important product of the hive. It is used to make smooth the interior of the hive, to help attach the comb, to close up holes and cracks, and even to varnish the comb. — Moon, T. J. (1921). Biology for beginners. H. Holt.
Even more recently:
While wax is the basic building material for the nest, with continued use the combs become modified by the addition of silk and propolis. The fibre reinforcement of silk in the propolis bearing brown comb was an order of magnitude stronger than white wax alone ; the former considerably stronger than the latter at all of the assay temperatures. — Hepburn HR, Kurstjens S (1988) The combs of honeybees as composite materials. Apidologie 19:25–36
PLB
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