W5 hive is dead. This was a big swarm cough around July 18 in a gas station in Bothell. We suspect someone in the neighborhood is making repetitive use of pesticides. I learned in horticulture class that homeowners are a big source of pollution in urban areas (particularly water pollution), due to yard care products. There are quite a few nasty products on sale at big box stores. These products should never be used on preventive routine applications, but only on curative applications, once a pest problem has been identified, otherwise the product may do more harm than good.
The bee colony dwindled until all bees were gone. Another sad loss, this was a strong swarm. I will pick up the hive tonight, as I need some material this week end for harvest and winter preparation.