Robert Ray wrote: I've seen this in a couple of areas now an accidental discovery when looking for praying mantis food might be the answer.
Robert Ray wrote:This article might be a bit better.
Robert Ray wrote:Hey maybe having a praying mantis close to the hive would be an answer if they'd just eat the offending flies.
Devon Olsen wrote:not sure if this has been asked but
WHY do you want to encourage swarming? what is the purpose of it?