Along with the British, the Soviets were engaged in anti-locust flight operations in southern Iran during 1943.
The Soviet detachment at RAF Jiwani, on the now Pakistan-Iran border, had a small dozen PO-2 biplanes. See e.g.
https://www.bbc.co.uk/history/ww2peo...a6068252.shtml.
References also in official documents available in the Qatar Digital Library (qdl.qa).
If anyone has come across a picture of the PO-2s involved or has a lead, then happy to hear so.
Thanks & regards, Leendert