J430... you're not wrong about the cropdusters...
I once had an RFDS MED1 priority flight depart an airstrip in Class G airspace. Shortly thereafter he advised me "I nearly got cleaned up by a cropduster on departure" and asked me if I knew of any VFR aircraft operating in that area. We had a lengthy conversation about it and a few issues quickly became apparent:
1. The cropduster was either not transponder equipped, or, had not switched it on (it didn't paint on the RFDS aircrafts TCAS and it didn't paint on my RADAR).
2. The cropduster was operating in the approach path of a country town airport and not monitoring the appropriate frequency or not responding to the calls made by the RFDS aircraft and by myself.
3. See & Avoid was not possible. This was a case of "See as we miss by sheer blind luck".
The RFDS pilot was a very angry man for five apparent reasons:
1. No transponder signal.
2. No radio call.
3. No traffic advice.
4. No See-&-Avoid.
5. My patient, my medical crew and myself nearly died.