This question is about matching sprayer nozzle design to the job of applying herbicides evenly with minimum drift.
- Fan and impact type: Fan nozzles spread the liquid into a flat sheet of medium to coarse droplets over a wide band, and impact nozzles use a deflector plate to do something similar over a wide angle. Both give the even, low drift coverage herbicides need on soil or foliage.
- Adjustable nozzles: These let the operator change the spray pattern, but they are a general tool, not the specific type recommended for herbicide work.
- Hollow cone nozzles: These throw a fine circular mist that penetrates deep into a crop canopy, which is why they are kept for insecticides and fungicides rather than herbicides.
- Triple action nozzles: A multi purpose nozzle design, used across different spray jobs, but not the specific recommendation for herbicide application.
Fan and impact type nozzles are correct because herbicide spraying calls for coarse, even coverage with minimum drift, which these two nozzle designs are built to give.
Let's summarize:
- Herbicides need coarse, wide, low drift coverage, so fan and impact type nozzles fit best.
- Cone nozzles are for insecticide and fungicide penetration, not herbicide spraying.
So fan and impact type is the correct option.