"PSPL" in the context of bottle gourd refers to the Pusa summer Prolific long variety Known for its long slender fruit. 

This variety is well-suited for cultivation in warm, humid climates, particularly in riverbed areas. 

A seed rate of 3-6 kg/ha is recommended, with spacing of 3 x 3 meters, and 60 x 30-45 cm pits.

It's a popular choice for vegetable gardens due to its high yield and relatively long shelf life