Analyze the "dosage-response" relationship regarding foraging behavior and colony health.

: Argue for more stringent regulations on neonicotinoids in landscape and ornamental plants where residue levels often exceed safety thresholds for pollinators.

: Sublethal exposure led to reduced nectar storage and diminished foraging activity, which can lead to colony collapse even if the bees do not die instantly.

: While low doses (less than 10 ppb) typical of seed-treated crops did not immediately kill queens, higher doses (20 ppb to 100 ppb) commonly found in ornamental plants and certain spray-treated crops significantly increased queen mortality by the end of the study.

Compare the survival rates of queens across different dosage groups.