Resistance
If resistance develops in the fly to the larvicide this will be transferred to the parastic wasp maggot and the wasp will survive.
1. 1 bag of wasps every 2 weeks for 3 months
2. Then monthly depending on the challenge level
In broiler breeders a similar calculation can be made.
The wasps are very small and will remain at the level of the manure where their food supply is plentiful. They do not attack humans.
Biological Fly Control