Caroline, the smoke sure didn't help but no I don't think that was the main cause as it started early spring, especially with the assorted bees, usually when the crabapple trees bloom they are all abuzz with all kinds of bees, this year hardly any, didn't see the usual spring butterflies either. I did see a fair number of Western Swallow tails and that's about it, they would flit around the garden and then were gone.