> I think it is likely false economy for any bee keeper to feed home brewed pollen sub as it is hard to get all the physical characteristics and nutritional characteristics needed. It is hard enough for the commercial pollen sub producers to get both of these right as can be observed by the fact that no sub on the market is as good as a mix of natural pollen.
This is not the experience of prof. Haydak. See http://www.fiitea.org/foundation/files/1967/M.%20HAYDAC.pdf (Table 4).
Kind regards,
Ghislain De Roeck,
Belgium.
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