thada1
New Bee
well, the formal answer would be to assess with a microscope >500 grains of pollen following a standard method of extraction. If the number of brassica napa grains is >60%, then it would be reasonable to assume that it's monofloral OSR. The relevant science is in Apidologie 35 (2004) S18–S25, "Harmonized methods of melissopalynology", VON DER OHE et al.
This is clearly a job for specialised honey analysis labs, but you could get an idea with less rigorous methods - sedimenting out the pollen, staining, and microscopy at 400x. Although, having just done this at the weekend on a microscopy course with Cazza and others, it's not a 5min job!
Here are some pictures from Bcrazy
This is clearly a job for specialised honey analysis labs, but you could get an idea with less rigorous methods - sedimenting out the pollen, staining, and microscopy at 400x. Although, having just done this at the weekend on a microscopy course with Cazza and others, it's not a 5min job!
Here are some pictures from Bcrazy
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