As far as I am aware 'esculentum' has no taxonomic validity applied to Musa.  From the context the name seems to have been (unecessarily) invented by Saw & Sulaiman or someone at MARDI as a catch-all name for the plethora of cultivated Musa in collections at MARDI stations in Malaysia. 

The MARDI collections contain a variety of genotypes most of which are best dealt with using Simmonds and Shepherd's genome nomenclature.

MARDI = Malaysian Agricultural Research and Development Institute.