These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| Sciarid fly action threshold | 20 catches per trap per week | ICAR-DMR manual, 2011. from the second flush; any adult in the first |
| Fly screening mesh | 35 mesh | NHB DPR model, 2018. on doors and ventilators |

