[sampo]

A critical comment:

Look at Figure 1B. The variation in the gut microbes is large at the start of the study (day 0). Feeding the bees 5 mg/liter glyphosate, they have a statistically significant difference from the control (no glyphosate) in 5 microbes out of 8. But feeding 10 mg/liter, they get no statistically significant differences from the control.

They have no explanation for why glyphosate seems to have an effect at 5 mg/litre concentration but not at the higher 10 mg/litre concentration ("The relative lack of effects of the G-10 treatment on the microbiota composition at day 3 posttreatment is unexplained"). They do give speculations, though.