Could you ask your beekeeper friend if other varieties of bees (and wasps as well) are equally sensitive to pesticides as well? In my tiny little urban garden,

Could you ask your beekeeper friend if other varieties of bees (and wasps as well) are equally sensitive to pesticides as well? In my tiny little urban garden, I'm noticing that there are fewer of other varieties of bees than in past years, and my hunch is that this is due to the chemicals being used to control mosquito populations. Likely this year I am going to pony up for the vial of parasitic wasps in addition to a new crop of mason bees, because the parasites are very much winning now.