sentences: "The authors further claim "our study suggests that these substances [i.e., neonicotinoids] are, at least partially, responsible for harming queens and causing population declines of social bee species.Failure of queens exposed to neonicotinoids during development to successfully lay fertilised eggs that subsequently develop into workers or queens is worrisome; both castes are vital to colony survival..."
  
  A 2015 systematic review (Lundin et al., 2015) of the scientific literature on neonicotinoids and bees concluded that despite considerable research efforts, there are still significant knowledge gaps concerning the impacts of neonicotinoids on bees.