I've noticed a lot of stink bugs in my back yard this year; way more than previous years. I happened to see one fly over to a purple flower Buddleja bush I have in the corner of my yard. When I went to investigate I noticed there were 20-30 stink bugs on the bush. I don't think the stink bugs are doing any harm but they are pretty gross/ugly. Any recommendations on getting rid of them (without chemicals)? I see there is a pheromone trap (link here brown marmorated stink bug - Halyomorpha halys) but wondered if anyone local has advice.