In the latter 1930s, towards the end of the Stearman's mail-carrying days, the aircraft became extremely popular for crop dusting. Delta used six of these early Stearmans for dusting work.
Registration and serial numbers for Delta's early Stearman cropdusters:
- NR8814 (MSN 228)
- NR7550 (MSN 166)
The four planes below were purchased from the Texas Dusting Company:
- NR3863 (MSN 106), this was a Stearman C3B Special
- NR6253 (MSN 144)
- NR6496 (MSN 207), this was a Stearman C3BM
- NR8813 (MSN 227)