My migratory apiary, consisting of 44 colonies, is located in a forest area of Khabarovsk Krai…

My migratory apiary, consisting of 44 colonies, is located in a forest area of Khabarovsk Krai from June 1 to August 1. The primary nectar sources are linden, raspberry, and in August, various herbs. An article by A.V. Korolev titled "Death of Bee Colonies in 2014" was published in the journal "Beekeeping" (No. 3, 2015), which resonated with my own experience. At the end of August, I noticed a decline in bee activity and numbers in one colony, initially attributing it to the natural loss of summer bees. I removed excess supers and reduced the brood nest to 10-12 frames, but the colonies continued to weaken.