Quote from article:
For adult bees, the available data indicate no or only moderate side effects even after overdose treatments of colonies or cage bees with LiCl (Pre?ern et al. 2020; Stanimirovic et al. 2021; Ziegelmann et al. 2018). In contrast, no published data exist on the effect of LiCl on the development of the honey bee brood.
Apparently this study was more into seeing what the affects are on brood compared to the previous studies that were done on adults.
Jim Altmiller