When one reads a paper, it often helps to read the supportive citations.
In the case of this paper, one can check the cited study from which they
based the dose of glyphosate applied:
https://setac.onlinelibrary.wiley.com/doi/full/10.1002/ieam.1529

In that study, the authors concluded: "No adverse effects on adult bees or
bee brood development were observed in any of the glyphosate‐treated
colonies. This confirms and extends the previous work on glyphosate that
reported no effects on bee colonies..."

So who to believe--the lab study (where the larvae were reared in plastic
cups and hand fed set amounts of diet), or the field study in which the
colonies were fed spiked syrup, but the bees reared their own larvae?

I suggest taking a close look at the colorful graphs in the in vitro
study--in 4 out of 6 (and tied for another), the larvae fed the highest
concentration of glyphosate exhibited higher survival than the control
group larvae.  And in two of the six, there was more larval delay in the
control group than in the group receiving the highest dose.  The data was
so inconsistent, that more cautious researchers may have hesitated to claim
that there was an actual effect, nor that glyphosate should be blamed for
killing colonies.
-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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